Eh, looks like you need to set the party up in tactician to do one type of damage. I got physical damage dealers that complement each other and have phys-armor check debuffs. The mage can be a summoner, necro or hydro healer in that kind of composition. I haven't done a mage party but I assume you wanna go heavy on magic damage so you crack their magic armor in the first few turns then CC them afterwards.
