I was messing around in a lab because I have seen a lot of people using the B34~Air Sai after the roll. I'm more used to the B3~telekick extender.
Anyway. I ended up in the corner practising stuff. This may have been posted in here somewhere. But I think it was a great discovery (for me at least) to get on the par in damage with the Piercing.
From the lovely F343 starter:
F343~telekick~air sai, uppercut, roll, B22~roll, throw -42%
I can feel it in my guts that someone is going to say "But you are never going to pull the F343 against a skilled opponent"
One bar other versions:
F23~EX telekick~air sai, uppercut, roll, B22~roll, throw -37%
F12B4~EX telekick~air sai, uppercut, roll, B22~roll, throw -38%
The B22~roll, throw nets you roughly 3% more damage, but doesn't the frame advantage of 21U4 ender.