So if player A already has a draw that wins 80% of the time, we may only have to enumerate slightly more than 20% of the cases on a different draw to judge that it is inferior. We can then skip all the other possible draws the other players (B, C, etc.) could make as well. This is a pretty standard technique; it can be applied here because the EV for each player (and the total EV) is bounded so we don't run into some of the odd multi-player cases.
Dead cards: 5s 5c 0: 3s5h7d9c/Qs 0.487821 1: 2s4s6s8c/Qc 0.512179
Draws examined: 72454441
Hand comparisons: 380306841
Draws examined: 50012
Hand comparisons: 81115
Pruned draws: 44
This hand is an example I came up with where even in the perfect-information game, position matters. If the players draw in reverse order, the Q8 should stand pat while the Q9 breaks, for 0.5 equity each.