Generally 15-20 BB is a good reshove stack but to deep to open shove. So typically we want to be min-raising or maybe going to 2,2BB at most, and then have some
hands, that are folding to 3-bets and some, that are willing to get it in. We also want to stay away from opening hands, that dont block peoples 3-betting ranges and dont play well postflop with a shallow stack to pot ratio like small pairs or low suited connectors. We would rather open a hand like A4o, since it block hands like AA, AK and AQ, and then fold it to a 3-bet.