Try to have your team (in a team of 8) have 4 physical and 4 magical units, in terms of weapon usage. Have at least 3 mounts. Maybe 3 healers. And at least 1 bow user, if not, two.
In terms of teams of 6 (which is fairly more common), I suggest having 3 physical attackers and 3 magical attackers, at least 2 mounts, at least 2 healers, and at least 1 bow user.
If you plan to build an unpromote-only team, I normally do 3 physical attacking units and 2 magic attacking units, and one healer. At least have 2 mounts and at least one bow user.
As for your specific stat builds, I have ideal fixes for most of them. I won't be keeping half your team, because it's very physically heavy, and some of them aren't really necessary. There's a lot of work to be done.
Cleric -> Bishop [Scholar]
Stats at level 20/20
HP [2/17.5%]: 58.00
POW [2/7.5%]: 30.00
SKL [2/7.5%]: 26.00
SPD [0/0%]: 19.00
DEF [0/0%]: 11.00
RES [0/7.5%]: 28.00
LCK [0/0%]: 16.00
Aurora/Wrath?
This build does everything your previous build did, but better. It auroras all the mages it should be activating aurora on, while maintaining longevity (doesn't get pursuit-ORKO'd and isn't brave fodder) and hit rate, and in case one of the oddballs that it doesn't aurora shows up, your sniper or other pursuit units should take care of it handily.
Moving on, your Wraith needs serious work. I'd go to the build MMM had before, but I have one better.
Dark Kn. -> Wraith [Bulky]
Stats at level 20/20
HP [2/17.5%]: 60.00
POW [2/7.5%]: 30.00
SKL [0/0%]: 15.00
SPD [0/0%]: 19.00
DEF [0/0%]: 27.00
RES [2/15%]: 21.00
LCK [0/0%]: 15.00
This should be used as your lead Wraith. It's not taking much damage from anything, especially if you happen to have a Ward staff on hand on one of your healers. Just watch out for magic pursuiters with crit tomes, and especially watch out for peg mages, as most of them will laugh at your hit rate.
Cavalier -> Paladin [Scholar] (Lord)
Stats at level 20/20
HP [0/10%]: 60.00
POW [2/15%]: 30.00
SKL [2/5%]: 27.00
SPD [2/20%]: 27.00
DEF [0/15%]: 23.00
RES [2/5%]: 19.00
LCK [0/0%]: 13.00
Pursuit/(Nihil/Impale)
This will be your standard pursuiting lord. This is your offense lead mount, and this will apply offensive pressure so long as it isn't threatened. Often times, if the opponent has a lead that's threatened by this unit, they will be pushed back, or go for a risky and/or bad first strike. This lord survives a lot. The only problem this lord has is it's rather modest hitrate, but if you have a War Medic on hand, or a hitmaster sniper, that won't be so much an issue. The secondary skill has a couple options. You have Impale to outright kill Peg Mages (who otherwise destroy this unit if it doesn't have Nihil on) if you have a Reliable Silver Bow, and Nihil ensures it can survive one round of anything barring magic crits.
For Sniper, I suggest going with this:
Archer -> Sniper [Offencive]
Stats at level 20/20
HP [2/5%]: 54.00
POW [2/15%]: 30.00
SKL [0/2.5%]: 26.00
SPD [0/0%]: 19.00
DEF [0/0%]: 13.00
RES [0/0%]: 13.00
LCK [2/17.5%]: 29.00
Insight/(Wrath/Impale)
This may look janky, but trust me, it's not. This is one of the best hitmasters you'll find. Not only will it hit anything with impeccable accuracy (Insight Longbows help a lot with first strikes), but because it's a sniper, it'll always have that big chunk chance to crit. Wrath is there to enhance that chunk of crit rate, while Impale is there to say hi to the Peg Mages that are literally everywhere.
My Unit Suggestions
I think I've went over everything you have. So far, this team needs a lot of work. If you want a balanced team, I suggest keeping the Paladin (lord), Sniper (insight build), Bishop (Magically Tanky), and Wraith (physically dual-tanky), dump all the others, and then add:
Troubadour -> War Medic [Glass Cannon]
Stats at level 20/20
HP [1/0%]: 40.00
POW [2/15%]: 30.00
SKL [0/0%]: 20.00
SPD [1/5%]: 27.00
DEF [0/0%]: 12.00
RES [0/0%]: 14.00
LCK [2/20%]: 34.00
Insight/Pursuit
This will provide offensive stability with insight and can act as a decent lead against teams with more than a few dodge builds. This unit also has very high dodge rate. However, because it is built just for dodge, if you get unlucky, counters WILL ORKO it. So make sure to de-equip its weapon by switching a staff to the top of the equipment list if you anticipate a counter unit. It's main ability will always be Insight, but Pursuit is there in case you need another pursuiter.
Gale Kn. -> Skyfire Kn. [Glass Cannon]
Stats at level 20/20
HP [2/12.5%]: 50.00
POW [0/15%]: 25.00
SKL [2/7.5%]: 26.00
SPD [2/5%]: 34.00
DEF [0/0%]: 7.00
RES [0/0%]: 19.00
LCK [0/0%]: 21.00
Pursuit/Nihil.
This will act as your extra healer, and apply offensive magical pressure on your foes. Just watch out for Valiants and Hawk Archers. Its stats are distributed so a Heavy Great Bow won't KO it. Pursuit makes great use of its ability to pursuit anything and everything other than other peg mages, while Nihil is there for bow users with Impale.
Shaman -> Druid [Glass Cannon]
Stats at level 20/20
HP [2/10%]: 52.00
POW [2/7.5%]: 30.00
SKL [0/7.5%]: 26.00
SPD [2/15%]: 29.00
DEF [0/0%]: 14.00
RES [0/0%]: 15.00
LCK [0/0%]: 17.00
Pursuit/Wrath?
Backup healer #2. This will apply as a full power pursuiter, and if you have crit tomes on, it can act as a check to several of the physically bulky units you'll find. (heck even if you have reliable-forged equips it still destroys those, and you can even finish with a physical unit if need be) The best part is, this unit doesn't get killed by braves, nor does it get killed by auroras, if you have Worm equipped.
Mercenary -> Swordmaster [Glass Cannon]
Stats at level 20/20
HP [2/12.5%]: 56.00
POW [2/17.5%]: 30.00
SKL [2/5%]: 26.00
SPD [0/5%]: 27.00
DEF [0/0%]: 13.00
RES [0/0%]: 12.00
LCK [0/0%]: 21.00
Pursuit/Wrath
This will fill in for your Berserker, and while it won't do nearly as destructive damage as your Berserker does, nobody still enjoys a pursuit double-crit or even a pursuit with a single crit for that matter. The thing about this unit vs that berserker is, it has a way higher crit rate, and unlike your berserker, can be shoved by your other units because of its relatively workable Con. This thing also survives any and all braves and counters if you have Knife equipped.
So with that, my proposed team is:
Offensive Mount Pursuit/Nihil Paladin Lord
Offensive Insight/Wrath Sniper
Offensive Mount Healer Insight/Pursuit War Medic
Offensive Pursuit/Wrath Swordmaster
Physically Defensive Mount Counter/Nihil Wraith
Magically Defensive Healer Aurora/Wrath Bishop
Offensive Mount Healer Pursuit/Nihil Skyfire Kn
Offensive Healer Pursuit/Wrath Druid
And doing a quick check on the team structure:
3 Mounts? Check.
3 Healers? Check.
2 Bow Users? Check.
4/4 Physical-Magical split? Check.
Now keep in mind, this team STILL has flaws. But the difference is, there's way less flaws. Like for example, almost every unit can't be one-rounded, but a majority of them can be 2-rounded. No team is perfect. But if you can work around the flaws, you'll be fine.
In terms of teams of 6 (which is fairly more common), I suggest having 3 physical attackers and 3 magical attackers, at least 2 mounts, at least 2 healers, and at least 1 bow user.
If you plan to build an unpromote-only team, I normally do 3 physical attacking units and 2 magic attacking units, and one healer. At least have 2 mounts and at least one bow user.
As for your specific stat builds, I have ideal fixes for most of them. I won't be keeping half your team, because it's very physically heavy, and some of them aren't really necessary. There's a lot of work to be done.
Cleric -> Bishop [Scholar]
Stats at level 20/20
HP [2/17.5%]: 58.00
POW [2/7.5%]: 30.00
SKL [2/7.5%]: 26.00
SPD [0/0%]: 19.00
DEF [0/0%]: 11.00
RES [0/7.5%]: 28.00
LCK [0/0%]: 16.00
Aurora/Wrath?
This build does everything your previous build did, but better. It auroras all the mages it should be activating aurora on, while maintaining longevity (doesn't get pursuit-ORKO'd and isn't brave fodder) and hit rate, and in case one of the oddballs that it doesn't aurora shows up, your sniper or other pursuit units should take care of it handily.
Moving on, your Wraith needs serious work. I'd go to the build MMM had before, but I have one better.
Dark Kn. -> Wraith [Bulky]
Stats at level 20/20
HP [2/17.5%]: 60.00
POW [2/7.5%]: 30.00
SKL [0/0%]: 15.00
SPD [0/0%]: 19.00
DEF [0/0%]: 27.00
RES [2/15%]: 21.00
LCK [0/0%]: 15.00
This should be used as your lead Wraith. It's not taking much damage from anything, especially if you happen to have a Ward staff on hand on one of your healers. Just watch out for magic pursuiters with crit tomes, and especially watch out for peg mages, as most of them will laugh at your hit rate.
Cavalier -> Paladin [Scholar] (Lord)
Stats at level 20/20
HP [0/10%]: 60.00
POW [2/15%]: 30.00
SKL [2/5%]: 27.00
SPD [2/20%]: 27.00
DEF [0/15%]: 23.00
RES [2/5%]: 19.00
LCK [0/0%]: 13.00
Pursuit/(Nihil/Impale)
This will be your standard pursuiting lord. This is your offense lead mount, and this will apply offensive pressure so long as it isn't threatened. Often times, if the opponent has a lead that's threatened by this unit, they will be pushed back, or go for a risky and/or bad first strike. This lord survives a lot. The only problem this lord has is it's rather modest hitrate, but if you have a War Medic on hand, or a hitmaster sniper, that won't be so much an issue. The secondary skill has a couple options. You have Impale to outright kill Peg Mages (who otherwise destroy this unit if it doesn't have Nihil on) if you have a Reliable Silver Bow, and Nihil ensures it can survive one round of anything barring magic crits.
For Sniper, I suggest going with this:
Archer -> Sniper [Offencive]
Stats at level 20/20
HP [2/5%]: 54.00
POW [2/15%]: 30.00
SKL [0/2.5%]: 26.00
SPD [0/0%]: 19.00
DEF [0/0%]: 13.00
RES [0/0%]: 13.00
LCK [2/17.5%]: 29.00
Insight/(Wrath/Impale)
This may look janky, but trust me, it's not. This is one of the best hitmasters you'll find. Not only will it hit anything with impeccable accuracy (Insight Longbows help a lot with first strikes), but because it's a sniper, it'll always have that big chunk chance to crit. Wrath is there to enhance that chunk of crit rate, while Impale is there to say hi to the Peg Mages that are literally everywhere.
My Unit Suggestions
I think I've went over everything you have. So far, this team needs a lot of work. If you want a balanced team, I suggest keeping the Paladin (lord), Sniper (insight build), Bishop (Magically Tanky), and Wraith (physically dual-tanky), dump all the others, and then add:
Troubadour -> War Medic [Glass Cannon]
Stats at level 20/20
HP [1/0%]: 40.00
POW [2/15%]: 30.00
SKL [0/0%]: 20.00
SPD [1/5%]: 27.00
DEF [0/0%]: 12.00
RES [0/0%]: 14.00
LCK [2/20%]: 34.00
Insight/Pursuit
This will provide offensive stability with insight and can act as a decent lead against teams with more than a few dodge builds. This unit also has very high dodge rate. However, because it is built just for dodge, if you get unlucky, counters WILL ORKO it. So make sure to de-equip its weapon by switching a staff to the top of the equipment list if you anticipate a counter unit. It's main ability will always be Insight, but Pursuit is there in case you need another pursuiter.
Gale Kn. -> Skyfire Kn. [Glass Cannon]
Stats at level 20/20
HP [2/12.5%]: 50.00
POW [0/15%]: 25.00
SKL [2/7.5%]: 26.00
SPD [2/5%]: 34.00
DEF [0/0%]: 7.00
RES [0/0%]: 19.00
LCK [0/0%]: 21.00
Pursuit/Nihil.
This will act as your extra healer, and apply offensive magical pressure on your foes. Just watch out for Valiants and Hawk Archers. Its stats are distributed so a Heavy Great Bow won't KO it. Pursuit makes great use of its ability to pursuit anything and everything other than other peg mages, while Nihil is there for bow users with Impale.
Shaman -> Druid [Glass Cannon]
Stats at level 20/20
HP [2/10%]: 52.00
POW [2/7.5%]: 30.00
SKL [0/7.5%]: 26.00
SPD [2/15%]: 29.00
DEF [0/0%]: 14.00
RES [0/0%]: 15.00
LCK [0/0%]: 17.00
Pursuit/Wrath?
Backup healer #2. This will apply as a full power pursuiter, and if you have crit tomes on, it can act as a check to several of the physically bulky units you'll find. (heck even if you have reliable-forged equips it still destroys those, and you can even finish with a physical unit if need be) The best part is, this unit doesn't get killed by braves, nor does it get killed by auroras, if you have Worm equipped.
Mercenary -> Swordmaster [Glass Cannon]
Stats at level 20/20
HP [2/12.5%]: 56.00
POW [2/17.5%]: 30.00
SKL [2/5%]: 26.00
SPD [0/5%]: 27.00
DEF [0/0%]: 13.00
RES [0/0%]: 12.00
LCK [0/0%]: 21.00
Pursuit/Wrath
This will fill in for your Berserker, and while it won't do nearly as destructive damage as your Berserker does, nobody still enjoys a pursuit double-crit or even a pursuit with a single crit for that matter. The thing about this unit vs that berserker is, it has a way higher crit rate, and unlike your berserker, can be shoved by your other units because of its relatively workable Con. This thing also survives any and all braves and counters if you have Knife equipped.
So with that, my proposed team is:
Offensive Mount Pursuit/Nihil Paladin Lord
Offensive Insight/Wrath Sniper
Offensive Mount Healer Insight/Pursuit War Medic
Offensive Pursuit/Wrath Swordmaster
Physically Defensive Mount Counter/Nihil Wraith
Magically Defensive Healer Aurora/Wrath Bishop
Offensive Mount Healer Pursuit/Nihil Skyfire Kn
Offensive Healer Pursuit/Wrath Druid
And doing a quick check on the team structure:
3 Mounts? Check.
3 Healers? Check.
2 Bow Users? Check.
4/4 Physical-Magical split? Check.
Now keep in mind, this team STILL has flaws. But the difference is, there's way less flaws. Like for example, almost every unit can't be one-rounded, but a majority of them can be 2-rounded. No team is perfect. But if you can work around the flaws, you'll be fine.
Show me your moves.
Formerly known as Magus.