here is the hand (for the sake of having amy example):
Hero opens 3bb from CO KQ94ds BU (reg, w\ 11% 3bet in this pot. and ~40% fold to 4bet) , 3bets (pot size raise)
effective stacks 100bb. is there any merit to 4b?

what hand to choose here if we aiming at widening out 4b range?
* I know 40%fold to 4b is kind of rare among regs (but thats from actuall spot)