I give a crap! Anyway, I was playing around with these combos (awesome video, btw) and discovered that one of them could easily be improved.
I don't know anything about hitboxes yet (just got the game yesterday) but this at least works on Kung Lao.
One of the combos in the video is: F42 >> F4 helios >> >> F42(hold), 4 [41%]
And I changed it to: F42, 4 helios >> >> F42(hold), 4 [50%]
You need to be real fast on the double dash or else they'll get out of stun, but this increases the damage output from 41% to 50% and IMO is easier to do.
I'll try to get a video of it later today.
EDIT: Apparently this doesn't work after the day1 patch. Since PSN is down I don't have it.