We have a good group and our DM does restrict us quite a bit. He was really tough on magic in the last (or this?) one. All magic users had to find or create their own spells. He just found Lightning Bolts and Fireballs made things too easy at times.
My Warrior Priest was (is) much more of a tank. I use some summon spells and wade in and when it's all over the healing begins!
It's just a great class!