Bullet Sponge Bosses are a Slog

Positive I love that most of the bosses between Act I and Act II (currently playing) have unique mechanics that make the battles interesting.

Negative Boss battles seem easier when solo vs. party. I have been playing in groups of 2 or 3 with friends, and the time it takes to defeat a boss has become exponentially tiresome. There are other games guilty of this (cough) Diablo (cough) but these battles are boring. It takes interesting mechanics and turns these battles into something dreadful and dull, not exciting and fun.