there's no reason to be so fixated on aggression that you can't open-limp a decent hand like a medium ace or two broadways from button/CO. With a small starting pot you won't be getting yourself into trouble with medium strength or unmade hands vs. the blinds. You can also exploit the blinds' unwillingness to fold TPNK to medium-sized bets in heads-up/3way unraised pots.