My god man, if you are playing ring and you know the oppo has AK when you have QQ (let's say you saw his cards or something) then you call an all-in EVERY time.

There are no variables. If you are both all-in pre-flop, you will win just under 54% of these hands. That figure is set in stone. If you are playing ring and can't handle the loss of a buyine WHEN YOU HAVE THE BEST OF IT you shouldn't be playing (this form of) poker.