Easiest is portals
My guess is you're going to get two very different answers. Some of the community (myself included) combined two objectives in one, which increased the difficulty, and others only did the singular objectives. Do you plan to combine them, or tackle one at a time?
My personal teams cause I think it depends on who you used, which side, and the AI you got. I went right side all times:Thinking with Portals: CGR, Galan, and Magik was my my teamRobots: Nimrod, Dragon Man were the main ones for me here. You can use Ultron/Omega Sentinel for your third slotBand of Mutants/Alternate Avengers: I used SW (Classic) mostly with Rogue on the teamHelmet Heir: Juggs and Crossbones Spidey: Peni Parker, Spidey Supreme, and Stealth Spidey
My personal teams cause I think it depends on who you used, which side, and the AI you got. I went right side all times:Thinking with Portals: CGR, Galan, and Magik was my my teamRobots: Nimrod, Dragon Man were the main ones for me here. You can use Ultron/Omega Sentinel for your third slotBand of Mutants/Alternate Avengers: I used SW (Classic) mostly with Rogue on the teamHelmet Heir: Juggs and Crossbones Spidey: Peni Parker, Spidey Supreme, and Stealth Spidey So you would say Thinking with portals is the easiest and the one with the spiders the hardest ? 😳