Character Card System

I guess the next big question is what combination yields the most damage. This is what I can think of so far;

For Warriors
Set 1
120 DrK - 4% HP
120 Paladin - 1.5 physical damage
120 Hero - 4% wep def
-Bonuses-
(S rank) +700 HP, +700 MP, +3 ATK, +3 M.ATK, +3% damage to bosses
(3 Advent.) +7 all stats
(3 Warrior) +8% HP to Damage

Set 2
120 DrK - 4% HP
120 Paladin - 1.5 physical damage
120 Hero - 4% wep def
-Bonuses-
(S rank) +700 HP, +700 MP, +3 ATK, +3 M.ATK, +3% damage to bosses
(3 Advent.) +7 all stats
(3 Warrior) +8% HP to Damage

Total;
8% bonus HP
3 physical damage
8% wep def
+1400 HP, +1400 MP, +6 atk, +6% boss
+14 all stats
+16% HP to damage

I imagine this would be the highest yield of damage for warriors. They have high base HP, and you can wash, so they really take advantage of the 16% hp->atk. I'm aware you can replace the hero with whatever other warriors, like DS, but I'll leave that up to each person to decide whether the Adventurer bonus is worth keeping.

If you want a sort of hybrid damage/boss build, you could consider replacing the heros with Demon Slayers in your card sets. Having 8% abnormal resist is so god like, plus you still retain your sexy 16% Hp->Atk thing.

I would think there would be a point (base HP wise) where instead of a Pally, you'd add another DrK for the HP boost, and the 4% HP boost on the 16% HP to damage would eventually triumph the 1.5 * level static damage bonus, which is maxed at 300. 1.2064 (HP) = 1.16 (HP) + 300. HP would have to be higher than 6466 to make the DrK HP boost > damage boost.

EDIT: Oops, this is assuming you don't already have a DrK in the group. I'll recalculate in replacing a Pally for another DrK.
1.2064(HP) + 300 = 1.2528 (HP). Same outcome. HP > 6466 means Drk HP->damage boost > damage boost from Pally.

This 6466 HP is base though, so that would make it somewhat harder to reach.

The same goes for the Mages. All F/P's for damage, and a Bishop here and there for extra MP recovery % from potions (if you need it lol).