JJ crushes hands AK doesn't really crush many hands and the hands that you do crush are hard to extract value from post-flop. Really need an A on the flop and when 2 are removed it's 7.5:1 to flop one. Then if you have a tighter table image people might me able to get away from their top pair on the turn.
JJ crushes 78(s),89(s), TJ(s), Q10(s), (KJ)(s), AJ, 44, 55, ect ect.