seems that healers love you. I actually kinda like the ideea of multiple fengshui users , on a map to keep all your units topped (because they can heal multiple units at once. Thats really nice especially on negative terrain like poison) , while keeping your actual healers as burst healers....but i dunno....i don't see that many maps to require such heavy healing (because having double feng shui kinda forces your team into bringing another healer for burst healing when fighting bosses ) , and 3 slots of a team used on healing seems a bit much



That being said , if you want to raise only 1 of them , Marr has the better AW ability (she gets range) and AW skill (when we get saws for plats) IMO , so i'd chose her if i were to raise 1.

Mia has a decent boost to gold gained per map assuming u lack Noel (assuming you care about said passive)