On the face of it, all you need to do is pot 36 balls in a row, making good position each time but the last. So.. how often can you manage 36 easy pots in a row without missing? now what about throwing in some medium difficulty pots, say 5-10, and then at least 1 maybe 2 harder pots? Now, pile a whole load of match pressure on that, and last but not least the pressure of approaching a maximum.
Here's an idea. Set up an easy pot, decide on a target position and play it. If you make position, set up the easy pot again, and decide on a new position, and play it. Continue until you miss the pot, or position. If you miss the pot, game over, start again. If you miss position, set up a medium or hard pot (to continue your break) and again decide on position. If you make position this time, revert to the easy pot, if not, pick a medium or hard pot again, and so on and so forth until you make 36 pots in a row.
It's a rough approximation, and likely easier than a real maximum as you don't have to make canons to develop balls, split the pack, cue over balls, cue from odd places/angles on the table, etc but it's perhaps a decent guideline and easy to set up and practice without too much effort.