Hi 0744379,
I am unfortunately sure that I cannot give you "the solution" here, other, more experienced judges will pop in,too.
121 hands is no samplesize - how many times did he got 3bet in those? 10? Maximum!
What I do is in Steal/Resteal-situations, to go down with my "go broke" requirements by 1 hand. So instead of QQ+/AK it would be JJ+/AQ+. But that is just to superficial for this hand.
We now have the difficulty that we need to look at 2 different possibilities:
Option 1)
* he adjusts - he would be 4betting more against resteals, he would also on top be more 4betting vs you due to reads. Then the solution is could be a profitable shove. Either he calls too much (option 1A we would be ahead and make +EV since we crush the range) or he calls too tight (option 1B he calls not often enough and we generate EV by him folding a lot)
Option 2)
* he plays just his range. Maybe he plays a bit looser in BUvsBB - did your stats suggest that he plays differently in steal/resteals, other than lets say MP vs CO ? Against a pure value-4bet-range we would be crushed!
Lets have a look at the ranges:
1a)
he 4bets: Ax,22-66,TT+,KQ =>we have 60%
he calls a shove with all pairs and AT+ =>he would call 124 out of 268 hands -> no profit by shoving alone, but we have 47% vs this range - which including the deadmoney and the folds makes us +EV
1b)same 4bet range, but he only calls allins with valuehands JJ+,AQ+
We only have 33% against his 56 hands -> but in 80% of the hands we will win the whole pot. (Please don't let me do the exact calculation for how big the EV is :-))
2) he plays his standard way, so 4betting and going broke with roughly the same range. There is a lot of players who do not really have a bluff4bet range and just occasionally bluff4bet. But: you do not know it.
If this was the case: you would be up vs AQs,AK,JJ+ while maybe AJ or A2 folds. Hard to guess the correct range - but a tight 4b/broke guy will have you mega crushed.
So what is it all about? Knowing our oponent - we could start playing the guessing game, but it would as kymupa said be to leveling. Why would we start leveling-wars on No Limit 10?
IF you have the experience he is just 4betting super mega light vs you then 4b/broke could be a valid option - but you need more information!