I think we need something simpler.
There should be excitement! Otherwise, several postponements of the game won't generate any interest! And the Tournament might drag on for an unknown amount of time.
Vitalica's suggestion of eliminating cards is also interesting; the conditions are clearly becoming more balanced.
Personally, I prefer 4 minutes per turn and a difficulty of 160% (and I know from experience that even a 2v2 game won't be too long with 4 minutes). At 200% and 1-2 minutes, I don't think I can handle it and won't be able to participate in the Tournament:(