Was on act 3 recently and had a random idea, when you fight alongside tyrael and kormac in act 3, kormac asks to spar tyrael. I think it would be fun to be able to fight tyrael but only when he is helping, which would be acts 2 and 3.
You wouldn't take tyrael's health down all the way, just to a certain point. and the difficulty would be similar to diablo or azmodan.
Or maybe even Leah or one of our followers.
Edited by Sephira#1128 on 6/16/2013 4:11 PM PDT