Yea, i kinda like having SW with BM in group, but:
My main is mage as i said, so i have 2 spots left in group. BM is must have person for me, so 1 spot left. SW has kinda high critical chance and backstab, making his physical atacks hit pretty hard, but i really love Tinkermage. He has infernal turret, that does usually around 200 AOE damage in turn with that battle frenzy and sometimes can atack three times + i have Alcander himself throwing razordisk for around 150+ damage, depend on target's phys resists + healing or slow or blessing pylon that are really good too, so Pure dps SW still does less ( in my group ) than tinkermage, his aoe not that strong and can't be backstab.
Still they might be equal or smth, idk, at someone else group