The biggest problem with stick is, if u don't go back to the neutral position after first 236 quickly, 236236 won't be successfully. So the easist way is with Ps3 controller :). U just need slide 236 two times and that's it:D
General advice on speeding my Angel Step up?
Imo the best way is practicing. On d- pad is 236236 really easy, but for 2362362/2362368 could be more difficult .
Btw, the angel side step from Cassandra is imo more difficult cause u should give the input more exactly.