66 and 22 are quite a bit different actually! Put it in wiz and see how the cEV and $ev values differ you'd be surprised.
15% is definitely too tight
I mean if you put this in wiz with some ranges it probably gives you similar range with 0 edge, but we should be taking a big negative edge. Bigger the blinds the more icm breaks down, with a hand like 22 you are probably making ~500 chips by pushing which is enormous and is absurd to pass on