In the Marvel Studios' "What If...?" animated series, the Guardians of the Multiverse is a team comprised of various alternate versions of familiar characters from the Marvel Cinematic Universe. While it's challenging to provide an exact scaling for each character's power level, here's a general idea of their abilities based on their portrayal in the series:
Captain Carter (Peggy Carter as Captain Britain): Captain Carter possesses enhanced physical attributes similar to Captain America. With the added mystical powers bestowed upon her by the Tesseract, she becomes even stronger and more durable. She wields a vibranium shield and is a skilled combatant.
Star-Lord T'Challa (T'Challa as Star-Lord): T'Challa as Star-Lord is a highly skilled fighter and strategist. He possesses the agility and combat prowess of a Wakandan, augmented by his use of advanced technology and weaponry.
Gamora (Adopted by Thanos): This version of Gamora is known as "The Survivor." She is an expert assassin and fighter, trained by Thanos himself. She wields a double-edged sword and is highly skilled in combat.
Doctor Strange (Sorcerer Supreme): This version of Doctor Strange possesses incredible mastery over the mystic arts. He is the Sorcerer Supreme of his universe, capable of performing powerful spells, manipulating time, and summoning mystical energies.
Party Thor (Thor with a different upbringing): Party Thor is a more carefree and party-loving version of Thor. He possesses all the traditional powers of Thor, including superhuman strength, durability, and the ability to summon and control lightning.
Black Widow (Natasha Romanoff): Natasha Romanoff retains her exceptional skills as an elite spy and highly trained assassin. While she lacks superhuman abilities, her agility, combat expertise, and resourcefulness make her a formidable member of the team.
Killmonger (Erik Killmonger): Killmonger possesses exceptional combat skills and tactical intelligence. He is a skilled strategist and formidable fighter, known for his cunning and resourcefulness.
It's important to note that the power levels of these characters can vary depending on the specific alternate universe they come from and the events of their respective episodes. The scaling provided here is a general assessment based on their abilities as depicted in the "What If...?" series.