As far as i can see there are two styles of enchantress and il probably try both.
the first and most common uses AoE attacks like firestorm and icestorm and lightning with either heal or some other skill
the other rarer or unused enchantress is a buff/debuff support character. They might use heal nightmare/weaopn breaker(I forget its name) and an AoE attack. Im going to try out this build after im done tihe my enchantress and Archer