Ive got a GR of 8500 and i specialize in heals/defense. I dont see why the healer wearing chain armor cant tank almost as good as a tank. I get taken out in a few hits+aoe attacks from enemies.
The problem is that tanks have no aoe aggro which lets minions escape and target the healer in turn messing me up cause the party has no heal juice and Im the one who gets chewed out.