There are 3 damage types,
ATK, (attack/sword in statistic)
AGI (agility/ wing symbol in statistic)
WIS (wisdom/mages staff in statistic)
so depending on what you or your foregoing fighter used, keep an eye out to pick the right buffers for yourself or them if you want to make the most of it, or stick to the 15% buffers.
ATK and AGI damage can be only dodged with DEF, WIS damage will be subtracted from your heroes wis stats, so that's why if you see someone coming on to you with a WIS fighter team (you'll know in a while ) Albert gets his big entrance, yes there is a use for him if you know when....!! XD
Damageformula:
Dmg= Mainstat-0.4xdef(wis)