Emma's are passive, not sure if they will work? Nowhere near that quest so no idea if it has to be a buff or passives work too
Emma and quake cap synergy if you can. Use Emma on electro her sp2 does concussion first so he does not reflect the sp2 damage.
Emma Frost, Bishop, Goldpool, Storm Pyramid X, aforementioned CapIW synergy, and Gambit. Also passive DoT works normally (Quake, Void's debuffs, and Mister Fantastic's debuffs with full F4 synergy) and I think that Torch's Nova Flames works, but I don't have him or have tried the path so I'm not sure. Also, you can power through the path with Aegon. With Aegon, it's possible, but it'll be like doing Labyrinth of Legends or Abyss fight since it's ninety percent reduced damage. The average health on that path is 260K which roughly translates into about 5 million health. This path also has some of the tankiest and biggest health pools in the game, such as Void, Thing (who has protection on specials so I don't even know who thought it'd be a good idea to put him on a special only node), and Man-Thing (who you don't gain extra damage from crits). Additionally, because of the Clapback node and triple power gain, your options are further limited as it eliminates some of the best mutants for big special damage--Domino and Namor--and restricts the playstyle for the best natural option: Sunspot since you have to really play around the power gain. The best options for this path seem to be Colossus, Havok, Emma Frost, and Omega Red (two of which require the CapIW synergy). If the boss wasn't so easy for this quest, I'd say it's absolutely absurd for Kabam to want you to use up a minimum of three slots to get through this path, but since any champ can beat Thor, I'm okay with it. My team for it will be: CapIW, Beast, Havok, Colossus, and Quake (or Omega Red if I can pull and awaken him by then).