In a deepstack tournament with 1,000 entrants and 350 remaining players, the hero finds themselves with 22 BB plus antes. The villain, who has a large stack of over 200x BB, has been consistently raising with AX+ to 3x BB. In this particular hand, the hero is on the button and holds K♣ Q♣. The villain, in mid positions, opens with 3 times the big blind and the big and small blinds fold.
The flop reveals A♥ 8♣ 5♣
The villain leads the betting with a bet of half the pot size. Although the outcome is not important, I am interested in understanding the math and strategy involved. According to the heads-up solver, the hero's hand is calculated to be behind with a 46.9% to 53.1% probability.
Given the above information, what would be the optimal decision for the hero based on the principles of ICM and/or game theory?