This match is as risky for both characters. First of all the good thing about this match is that kabal can't build nearly as much meter as he is able to against most of the cast.
You can get in using ex superman to combat his zoning attempts and the universal methods of approaching characters (dashing crouch blocking in etc) while the kabal player has to take into account that you also have the threat of tele as well as ex tele. F4 has a 9f startup so it's possible to punish Raiden's tele but i'm not sure if that's possible while doing a iagb so you''ll have to test that with that player a bit further. What Raiden can do to combat this though is do ex tele which would make his f4 whiff and you can dash in 334 into a full combo. Also be wary of the kabal player trying to bait an ex superman out of you while he does iagbs since they recover very quickly if done well and you've got to read that he's going to do one and react with ex superman. You can check him with d3 after a tele or during his his pressure game.
The downside to this match is that Raiden has a big hitbox as you mentioned but that's all Kabal has in this matchup (and 111DC) that isn't a guess or a huge guess against raiden since raiden is able to teleport out of most of his strings and avoid his zoning, plus you have to take into account the difficult execution of 2DC nd if the kabal player messes up, you get a full combo punish.
EX Shocker is an important tool in this mu also to interrupt his dash cancal pressure but it's very risky unless your sure of the read. You can superman over saws from about 3/4 (maybe mid depending on you reactions) to full screen on reaction so the kabal player should know this and avoid doing it. If this kabal player is who i think it is, then you might want to avoid using 334 and b312 as high level kabals with godlike reactions would be able to interrupt those strings with ex nomad dash but if that's happens you can cancel into tele to make it his punish whiff and punish him yourself instead. Raiden viods the use of kabals footsie game, zoning, corner and most of his NDC pressure (it's important to know this part of kabal thoroughly) so raiden already doesn't allow him to play his game. His only option imo is to rush you down so make him play your game and let yourself dictate the pace of the fight, taking the kabal player out of his comfort zone.
These are the strings you're able to tele out of on block (not sure about on hit so you'll have to check out the kabal frame data) and the last two are the ones your not able to tele out of. Check out the kabal pressure system thread for more in depth info on this.
F3DC-0
F32DC-+2
B1DC-+1
B12DC-+2
21DC-+2
F4DC--5
2DC-+9 (Free b1 or f3 check after)
111DC-+8 (Free f4 check)
