Frungy

I'm about to start act 3 in a PoTD game with all custom characters, so far they're level 8 with a pally tank, fighter tank (trying the guardian/prone if disengaged build), ranger (weapon damage, no pet damage), chanter (ranged support), wizard and priest. Sort of regret having a pally main, since 2 main tanks doesn't seem that necessary and pally damage is sub-par, though I haven't looked into pally dual wield in depth yet. I notice there's a TON of mobs in each pull- should I get more AoE damage into the party, instead of just the wizard? Priest doesn't really have much yet, but they get a few later. It's nice for the ranger to unload on the back caster mobs, but I'm considering replacing the ranger with something like a druid for more AoE damage. Though that also makes the priest rather redundant. I haven't gone into White March yet- should I focus more on AoE damage, single target damage, or a balance of both?