Robin has a vortex. There, I said it.
After strings into Swoop, Robin is +15 (standing) and at a very powerful distance. Almost all of his normals jail from here, and once the opponent gets tired of having their ankles cut, they're going to start blocking. Which makes what happens next look like Dick Greyson is still alive because it's a goddamn circus act. Peep it though.
Ji2 crosses up. Ji3 does not (for completion sake ji1 doesn't cross up either and may actually be preferable). They float long enough to hit OH, as well as threaten a cross up.
For reference, this is the kind of damage I put together but there are a lot of possibilities with or without meter, that lead to set-ups/ oki and catch jump outs. Please play around with it if you haven't already.
Double OH cross ups, too. Blade Spin is -7 (0 if you MB). Ji2 xx Blade Spin/ ji1 xx Blade Spin. HKD is +22 or MB to launch for good damage.
Aw yis.