A single deck game, with shuffle after each hand, can have about 0.3% shaved off the house edge (or added to the player edge) by following composition-dependent basic strategy (eg. 7/5 v. 3 = stand, not hit.).

With three spots available for play, with shuffle point extended to after those three spots have all been played out, how much would perfect composition-dependent strategy then add to the return? Clearly, it must be more than for just one hand, since three cards on the table now becomes seven.

Are there any tools available, either online or software available for purchase, that can generate correct strategy?