... and depends how many chips you have when there is 2 players left. 8-tabling though, my HU strategy is basically push every hand which stack<8BB, people at $22 fold way too much.

Over 761 @ $22
1st 16.7%
2nd 9.3%

Standard error of 3.6%. Might be running slightly hot so I think 15% for 1st is sustainable at $22, of course, does mean sacrificing the ITM for a bigger stack end game.