ummmmm sounds tasty....
I can say from experience, that Mud Pots for what little damage it does holds aggro decently. That is why I use it. Once in the mud pots things just about NEVER leave them to attack someone else, and I can focus my provokes on more distant enemies to pull them in towards me.
Although I think the small AoE taunt generated my melee attacks is a great idea.
How to represent it.. SIMPLE. Do it like they do in the comics, draw the tanker with progressively darker and thinker lines to show that they are more and more furious...
As for the build up, yes, it sounds great. And yes i'd love to see a WoW style "fury" bar.
