You have some good ideas there but I see one little problem. You say damage is accumulated until a threshold when the phase is beaten and then you move to the next phase that means that still technically one player could do enough damage to hit the threshold. I know that you also suggest Rancor becoming stronger with each toons turn but still in theory that doesn't completely eliminate the problem.
That issue I think can also be addressed by guild leadership to work out a scheme that can help everyone.
What I absolutely agree with is that rewards should be tiered and not given by rank. In my guild you can do 2mil damage and not even make the top 20 anymore despite relatively speaking being only a bit behind the first.
