Some of the stuff said in this thread just makes my head want to explode
Like what?
I'm thinking:
1) fold
2) 4-bet
But dj and Al are far more advanced than me so I'd listen to them first. The fact that they disagree probably doesn't help ...
1. If you don't feel that it will be profitable shoving over a 4bet against this villain, then just flat pre. Look at his opening range from UTG+1 and 4bet range(if you have a decent sample), none of this 25/17 bullshit. Fwiw in this situation i think you can profitably call here, but this is just due to you being 120bbs deep and his too small 4b, and even then its still iffy.
2. Call, fold, 4b/call are all viable options depending on villain.
flat pre, as played fold to the 4bet unless u have a good idea he can 4bet light which i doubt u do coz its 100nl and ppl just never 4bet light often enough, if ever.
If they 3b to 9bbs 4betting to 25-27 is too big 100bbs deep. I'd make it ~21 IP and ~22,5 OOP against a solid regular. Most people won't flat your 4b regardless. If they start to flat then make sure you 4b bluffs are with hands with good flopping potential(remove most Axo, add some KQ,KJ,ATs typehands).