Synergy over everything.

I'll itemspam for healing instead if it's an option ^^~ (I do this in each Squenix/Tri-Ace game I've played in recent years !).

However if the healer has something else to give if the Itemspam is an option~ I'll ovcourse choose the healer if I like it more as a character~ (Attack Speed Buffs, Giant AoEs, w/e~!)