My train of thought for 'lock vs. wizzy was simply that I have an SK tank. He's doing AOE, may as well help the mass destruction along.

My troub is really getting to be second nature. I think I might swap back to /follow tank for initating combat with the troub as well as the 'lock. That should keep my warlock in range for his PBAoEs and if strafing is working, make my troub a little more hands off.

I can't comment on the paladin, since I've not played one, nor has my husband. I don't even recall playing with one. I do know the mystic and defiler both felt like totally different classes on the damage end. Possibly just my perception, but something to consider prior to betraying them. You might find they are a lot closer to what you want as you level them and betray them.