I like the under 222 a lot in this game, but I think this player prop is an even safer way to bet the under.
Ayton is a role player and doesn't play as well or score as much on the road. It should be a tight game and he will probably rack up some rebounds, but I don't see him scoring that much. Coming off a 20 point performance at home, this is probably a couple points too many.
I think I'm 6-2 with these player props in the NBA playoffs so far this year. I have been betting some of them at -120 - -130 FWIW.