I know its REALLY late to comment here, but I stumbled across this and can tell you, Raiden has no good solutions for anti airs, particularly cross overs. The only tool he has to handle the cross over is to njp or superman out (and for the raidens..good luck with the njp online). the teleport is wonky in the case of a cross over and often times places Raiden right in front of the punch for full combo. the V Blast is NOT a solid anti air. It has a very slow start up , and is useless when being crossed over. He can superman a jip from the ground or in the air but thats besides the point here.
Keys to success: Milly Vs Raiden
-Down 4!!!
-Cross over jump punches, followed by mills brutal high low mix up game.
-ALWAYS expect superman on wake up.. and if you happen to get a teleport..DOWN 4!!!!
-Raidens that teleport after strings need to be thrown. ESPECIALLY b312.. it moves in a slow motion, giving you all the time in the world to anticipate the end of the string so you can move in and throw that ass.
I main Raiden and I can verify that these tactics drive me crazy. If the teleport is punished consistently like i have shown above, all thats left is for me to fight fair and face up opponents with f24's, cross overs, and jip's.