+(3:1), x7 on a crit = 21:1 on an 18-20 with a greataxe, and there ya go.
It just seems that, for no penalty to the attack roll that's a helluva lot of bonus damage; furthermore, I don't think DevCrit is an applicable counter to this point since you suggest replacing DevCrit with either your Multiplier feats or the metamartial death blow (the specific name escapes me).
Please consider the numbers, since it looks like it's a bit out of whack from where I'm standing.
It just seems that, for no penalty to the attack roll that's a helluva lot of bonus damage; furthermore, I don't think DevCrit is an applicable counter to this point since you suggest replacing DevCrit with either your Multiplier feats or the metamartial death blow (the specific name escapes me).
Please consider the numbers, since it looks like it's a bit out of whack from where I'm standing.