If you don't have poison debuff champs I'd recommend de Pablo, cable if u have APOC is also good and AA would also be great
Act 7.4 Kang boss is not bad once you get the phases down. Ultron was my MVP - that extra healing allowed a lot of wiggle room to mess up. Venom was my other MVP - tons of buffs and debuffs. Odin was MVP #3 - tons of buffs too, major SP2 damage and his prefights added to Ultron or Venom make them even better. You kind of already have those covered, plus Herc and Kitty - you should be in really good shape for 7.4 Kang.8.1, that bishop will melt the boss - Kitty and Herc too. All I can suggest is go to Youtube, watch the "easy path" videos to see who you need / want for the paths and how to handle the boss and go for it after that. You can cheese some paths/bosses - You might not get solos or have to use a couple of items, but none of them should be crazyAvoid black panther in 8.1.2 - he was the worst one. Doesn't look like you have a red Mags, unfortunately either so that makes some of the bosses a little trickier...8.1.1 hood is easy8.1.2 I'm not sure your best option without magneto or a constant armor breaker (probably she-hulk boss)8.1.3 psycho-man is easy - Odin/Herc will destroy him, just keep evading SP1's8.1.4 I actually thought ebony maw was very easy with torch pre-fight, but corvus is pretty easy too8.1.5 take out Herc8.1.6 slam the boss with Bishop, Herc and/or Kitty. She's actually pretty easy once you get her specials down. Special One, evade the last hit. Special 2 evade the first hit. Wait for the traps to say "set" (even if you can't see them from the VFX bugs - note where she is when the special ends) backup a little so you don't accidentally walk into them, and try to parry/heavy or hold block and counter with a special to knock her into the trap and go ham.