heard mobfarming is senseless since they give no gold anymore...
only if they have a lower level than you
for healer aoe:
pull mobs with particle of light, then do the skill which gives you fanaticism, thunderstrike, and them spam chain of light into the mobs... they will die really fast
works good with support aspect and even better with aspect of assault
healer is AWESOME for aoe, in PVP too!
as dragagon said, bard / mage / healer is at this time the best choice (for EVERYTHING!)
as a bard your farmsetup is like mob, flying blade, mob, flying blade,............ its also kinda addticting
for farming, support-sorcerer is the best since he does not get slowed by mobs + you run faster; if done correctly you will kill mobs faster than the lootpet can collect the loot
also he laves puddles of fire on the ground to kill eventual survivors and can aoe-burst every few seconds... if you have done this once, you never want to go back to somthing else lol