For a N player games, during dominance phase does give
N-1 power for the 1st player,
N-2 power for the 2nd player,
N-3 power for the 3rd player...
will break the game ?
In case player are even they receive a lower amount of token. 2 player are even on the second amount they both receive N-3 power (as they were both 3rd).
If that is too much we can think as a different reward ladder.
I would avoid rewarding people for dominance (e.g. doing less), because I don't think that'll speed up the game in the way you intend. Encouraging challenges is better, since it's more likely to leave people open for big swings. If I had to increase the pace on a melee game, I'd double the Support bonuses (2 power instead of 1).