I'm making a trio... need some advice

[Camaro_guy]

In my current duo I have a Shaman and Bard(yes I know a little strange but want to see how it will work). Anyways I want to add one more character, but im not really sure what will be more useful an enchanter (for tough crowd control situations) a magician (for the pet and added spell dps) a wizard ( for pure spell dps) a necro (whom which can heal himself and the party a little bit while dishing out a decent amount of damage) I mainly want a pure caster class, but just want some opinions on which one to make everything run smoothly. I'm leaning towards a necro or magician, but also really wanna run a wiz! (see its just a little frustrating wish i could have them all =P) Thanks in advance