My top 10 after 52 days played... currently with a growing alliance, working through U5 atm (78% last run). Red stars are probably my least favorite aspect -- luck out on a 5rs pull and that toon is suddenly beast mode. And I really need to unlock that Loki node, but I'm really missing a good 5th mystic character to get to Mystic 3-6. I really don't want to level up Elektra, or America Chavez. I need Mordo, or Nobu, or Strange. Hand would work, but meh.
Noting my red star collection for posterity.
5rs: Loki (3), Mystique (3), Drax (2)
4rs: Green Goblin (4), AIM Security (2), Scientist Supreme (0), Deadpool (0), Thor (0), M'Baku (0), Okoye (0), Rhino (0)
3rs: Sabretooth (0), Falcon (0), Korath (0), Rocket (0), Gamora (0), Hydra Trooper (2), Hand Blademaster (3), Elektra (3), Crossbones (3), Psylocke (4)
2rs: Minnerva (3), Punisher (3), Bullseye (2), Hulk (4), Wolverine (3), Shield Medic (3), Kree Cyborg (2), Mantis (2), Colossus (2), Storm (2), Hand Sentry (2), Shield Assault (2), Ms. Marvel (1), Hydra Scientist (1), Hydra Grenadier (1), Hydra Armored (1), Iron Man (0), Dr. Strange (0), AIM Monstrosity (0), Thanos (0), AIM Infector (0), AIM Assault (0), Quake (0), Cable (0), Killmonger (0), Shield Security
Noting my red star collection for posterity.
5rs: Loki (3), Mystique (3), Drax (2)
4rs: Green Goblin (4), AIM Security (2), Scientist Supreme (0), Deadpool (0), Thor (0), M'Baku (0), Okoye (0), Rhino (0)
3rs: Sabretooth (0), Falcon (0), Korath (0), Rocket (0), Gamora (0), Hydra Trooper (2), Hand Blademaster (3), Elektra (3), Crossbones (3), Psylocke (4)
2rs: Minnerva (3), Punisher (3), Bullseye (2), Hulk (4), Wolverine (3), Shield Medic (3), Kree Cyborg (2), Mantis (2), Colossus (2), Storm (2), Hand Sentry (2), Shield Assault (2), Ms. Marvel (1), Hydra Scientist (1), Hydra Grenadier (1), Hydra Armored (1), Iron Man (0), Dr. Strange (0), AIM Monstrosity (0), Thanos (0), AIM Infector (0), AIM Assault (0), Quake (0), Cable (0), Killmonger (0), Shield Security