A9s

Is this 3Bet pre-flop part of your normal BTN vs MP 3Bet range, or do you have some sort of history with this player?

I'll let the turn play part be answered by those with more experience at this limit, since I'm interested in knowing.
It seems to me though, that you can barrel any turn that contains a broadway card, a heart or pairs the board.

I'm curious to read what the real experts think though...

he have high FTCB in 3Bp

Fold pré, i don't see why we would want to 3bet that hand at all. A lot of better hands to 3bet whatever the reason. If your idea is to 3bet cause he fold a lot to cbet, imo suited connectors, one gapper, 2 gappers, and with blockers is way better. As played cbet higher, we're mostly call by better hands and worst hands fold with this sizing, draws calling or raising gonna makes us fold. Plan turn idk we're kinda fked this hand seems spewy to me, should not be in that spot

fold pre: A9o is terribad, you can add top folding range before than this hand. As played you need speawy on K-J-8 and <3