You want someone to be able to cast counter spell after act 1. That helps just so much.
Then who should I drop in favor of either Wyll or a wizard ?
I kinda wanted to romance shadowheart and I felt that a rogue would be nice for scouting.
I've chose to keep Lae'zel simply to add another meatshield. Felt like having only a 2h paladin up front with a rogue in melee would be weak but maybe cleric can get tough enough to tank ?