Equipment is based upon the variety or the quality of the equipment the character uses. For example, Thor while he only has 1 piece of equipment Mjölnir, it’s extremely powerful so it would receive a high rating. Also with Batman having all the equipment would also receive a high rating.
Teamwork is based upon how they are with a team and how they handle leading a team. For example, Professor Xavier would receive a high rating for being the leader of the X-Men. Wolverine wouldn’t receive as high since he does lead teams but is often a lone wolf.
Abilities is based upon the powers a character has but only in special abilities not for fighting or strength. Example Magneto would receive a high rating where Spider-Man wouldn’t be as high.
Intellect is based upon a characters intelligence, they don’t need to be a scientist to receive a high rating but must be relatively intelligent. Example Daredevil while not a scientist would receive a high rating but not as high as Dr Doom.
Fighting is based upon a characters fighting skills and agility, however someone who is super strong is not necessarily a skilled fighter. Example Hulk is not really a skilled fighter but someone like Deadpool is.
Strength is pretty basic, based upon how strong someone is, however strength can be strange as there are people who are much stronger than average but not super strong. Example Captain America is strong but not as strong as someone like Doomsday. Strength may be affected by equipment such as Iron Man