@shark Don't think Henry is part of the T20 equation - he struggles to bowl at the death in ODIs because consistent line and length is predictable and eminently sloggable.
I think Santner's got more to offer with the bat than he's shown so far. It's a bit of a thankless task batting at 7/8 in a T20 because you're often going to come in and have to face about five balls and swing away. You can do a good job by scoring 12 runs, but no-one's going to remember it.
You make a good point re Henry. But I still like his strike at the top of the innings.
You won't away me on Santner though. He's a really, really good ODI player because both his skillsets suit the pace of that format but in T20 his batting is no good and in tests his bowling is almost purely about containment.