I keep getting in these spots roughly 150-300bb deep on 100NL and I kinda freeze up with my aggression. Part of it is correct because you don't want to over play AK or TT hands when your deep and oop, but I think part of it is just not pulling the trigger. I have an uncertainty of correct deep stack strategy.

Example #1 villain on the button is unknown, but has shown a willingness to 3bet at a high frequency. I've seen him 3 bet a couple of times now over a tiny sample trying to isolate weaker players. I 4 bet him once and he just snap folded.
Currently 5 handed. Hero opens (MP) technically cutoff AhKh $2.50 and Btn 3 bets to $7.50 I elect to flat roughly $175 deep to keep his dominated hands in because I know he has a wide range and suited hands still play well oop. Not sure what hands I should be 4 betting here. I did watch Sauce123 deep stack series where he flatted KK in MP 300+ bb deep saying it's a low frequency 4 bet vs button.

Example #2 UTG limps $1, btn iso $4 (regular pretty ABC), hero SB TT flat calls. At 100bb standard 3 bet spot here for me, but we were around $200 (200bb) deep and I didn't want to play a bloated pot oop with TT.

I think I just need to be 3 betting / 4 betting these hands, but looking for some confirmation. Snowie in general gives limpers a ton of credit and over limps as strong as JJ, so can't really rely on snowie for feed back when facing a limper and an iso. Snowie only plays TT+, AKo, AJs+, KQs when there is a limper and a 4bb iso and hero is in the SB. Super nutted range because snowie thinks limper has hands like TT, AK, AQs etc in range.

Debating maybe going back and watching some old deep stack play from a couple years ago, but not sure what videos are best. Sorry is post is a bit unorganized. Appreciate any responses I receive.