its probably nash equilibrium ranges. so you break even if your opponent plays the equilibrium and are ahead if your opponent deviates. however, if you know your opponents ranges then you are leaving money on the table by using a nash strategy.

also, it's a bit more complex because its not heads up so i don't think there is a proper equilibrium. but i've seen a lot of preflop ranges that for these small stacks that claim to be solved using computers. i guess with multiway they use a lot of abstractions to make the problem simpler.