This is just a spur of the moment idea, but what if you could only have one crit buff running at a time.. This would mean MAs could only have UVC running, but no TTS of AF, and all other professions (except for agents) could only have either MoP, TTS, or AF running. Agents would be able to have only one of their fancy 50% crit buffs, and a 100% at the same time, since their so short, but i think critting has gotten out of hand. \
Bump, Flame, Flame with bumps, bump with flames.