You can solo the game with one mage, let alone 4 of them. ^^
"do a lot of damage except cleric ofc but cleric can boos their AC and damage even further."
Cleric with inflict wounds is kinda insane, it's up to 40 dmg on 1 spell.
For mages -> mage armour( lasts whole day) + mirror image per combat. Problem solved.
