If you were losing aggro when stance dancing in 4 man content you were just bad, even in trash pulls my grit was on for maybe 1 unleash then it was dps time and nothing lost aggro. Dungeon bosses were so short 1 aggro combo was enough to hold the boss till it died, or 2 if you had a good dps that for some reason didnt press their free aggro buttons.
Also you emnity idea just sounds incredibly arbitrary, I dont understand whats fun about it.