The normal 3-2 payoff is worth 2.33% to the player...The 6-5 payoff is only worth 0.93%, so you lose 1.40%...The hitting a soft 17 costs you 0.20%, so you are looking at a disadvantage of 1.60%...If you are talking about a 6 deck shoe, it is all hopeless...If you mean a one deck shoe, I would guess that your spread would have to be at least 25 to 1.