PE figures are originally from Grosjean, but are also published for the world to see on apheat.net The playing strategy we (the friends and I who found this game) use has been simplified as much as possible toward "the obvious choice" when applicable, and "wait and see" when not.
As condensed as possible:
--4x any player JX or better vs. dealer exposed X (i.e. player likely dominates dealer)
--4x any TX or better that will flop a pair, with exceptions where X is <9 and dealer exposed is same as non-X (basically don't 4x when you're likely to be outkicked flopping a pair)
--4x any pair 33+ unless dealer exposed pairs over (duh...)
--4x any pair that will flop a set, regardless of dealer exposed (also duh...)
--2x any flopped top pair (assuming not known before 4x action), unless kicker <9 and dealer flops same pair
--2x any strong draw unless against superior dealer (i.e. no 2x open ender vs. dealer 4-flush, no 2x 4-flush vs. open pair w/ dealer trips, etc.)
--1x any face card vs. dealer unmade based on exposed (exceptions for suited/connected boards)
Other than that, for other situations that don't seem intuitive or offer any advantage (like player T5o vs exposed 6 and no flop seen) we're just reverting to basic strategy.
As I alluded to above, I'm sure there's a lot that's being left on the table and possibly some bad decisions, but even so the outlined strategy we're using vs. the level of exposed cards we're seeing should be hugely in our favor. My terribad run was the product of losing a lot of dominating 4x bets (ex. 4x QJ vs 99 knowing board is QXX [came QQ4], another player holding K9, river is case 9), and simply finishing with literally unplayable hands like 7-high. Mercifully the majority of those 37 hands I did win were for 4x or 2x.
I figured that the calculation would be ludicrously complex, hence my attempt to get someone else to do it
I also figured the probability of losing would probably be higher than my gut tells me it should be, and that playing with the strategy we use is likely to be extremely swingy...especially playing for $10 units.