I took speed, it lowers the cooldowns of malicespells since you dont do too much dmg you might have a probelm holding the aggro so i try to approach it that way.
Defense all the way, i dont think HP is too good because of the low potcooldown. Using so many pots provides enough theoretical HP and Defense scales better with that.
In the Envoys Path I also tried to get as much DEF, Speed and Malice as i could.
Best subclass is probably Harp or Staff, for heal or CC, i took the Axe areadmg.