Deco, out of that defending range what are you 4betting and what are you flatting?
Depends on how much villain folds to 4bets and his sizing, as an average I'd go with:
4bet Bluffs: (Good blockers)
A2o-A9o
JT-KTo
QJo
Value 4bets: (Good equity)
99+, AK, AQ
Flat: (Can flop well/pretty sooted hands)
Everything else
You are obviously much better post flop than me so I wouldn't be able profitably flat some of the hands you do in which case I would have to tighten up my opening range a lot tighter than you
A more conservative flatting range would fair fine villain is miles off from achieving the anywhere near 65%.
I should state this is an extreme range for someone 3betting button opens around 17-20% before you go flatting some of the weaker parts of that range. Although I should also mention folding to much to 3bets is a leak of mine and if I was to alter this range I'd likely widen it.
so i'm guessing 75s would be borderline
*75s isn't quite the bottom of my opening range, I'd far sooner drop 78o, K2s, Q6s, semi-connectors are great in flatted pots.
*The range above is an extreme example against someone 3betting 20% vs our open and flatting a wide range of hands, it's rare I'd tighten up this much and I'd never tighten up any further than this against full stacked villains.
*In the OP we've very little convergence on the SB and an average looking 3bet% on the BB, and nothing to suggest they flat super wide.
Folding 75s here isn't burning money or anything I personally just think it's an over-adjustment given our circumstances, the stats of the villains in this hand do not strike me as super worrying or nothing.