Bump up rev % after a certain pop threshold

[Flaborized]

Yeah I love rev and it's a shame it's so rare.

The game mode hinges on people knowing what rev is, and because it like, never happens, the heads are always caught off-guard. I've had lots of great times as a head and as a rev and I think that the frequency should be bumped up to around what nuke is at. It's currently about as common as blob afaik. It's a lot of fun and we never get to see it!