i wouldnt 4b this deep. it's just going to bloat a pot which you have to play relatively deep and OOP (against a range you are unsure of) with heaps of boards which cause you to shit your pants. or villain will 5b us and we have to fold our equity when we could definitely have just called his 3b profitably. so don't 4b, and once you do, very very definitely fold to his 5b. he's not fucking about this deep and versus your EP open/4b range. i expect to see KK+ at widest.