Do we have any info on villains threebet/fold to 4bet stats? In general I'm not a fan of this kind of bluff unless we have a decent bit of info indicating that it is going to be profitable.

On the flop by betting we are going to fold out all stronger Ax that may have peeled and potentially some overpairs like TT/JJ, but the second part here seems unlikely to me. If we are going to bet I like your small sizing as there is not need at all to go big here.

I don't mind pre with the ace blocker. The ranges w34z3l gave me have this as a default along with some suited Ax Kx and KJo for BTN vs SB.

In a 4 bet pot you have two choices for 100bb deep play, either about 1/3 on the flop and go for a 3 street plan, or bigger on the flop so you can shove the turn without it being an overbet.

I'm leaning towards checking the flop back and giving up unimproved here. I wouldn't expect a reg to be playing a weak range OOP in a 4 bet pot, so there's going to be a lot of pairs and AK AQ which are never folding.

4betting this is obviously fine but given the stakes I'm not expecting super wide ranges in 4bet pots and therefore I'm not in a hurry to 3bet this. If I decided to do so I'd probably go for something like 1/3pot due to low stack to pot ratio.