So: I want to find out what is the Best Class or set of classes in the game.
I think some markers for a “Best Class” should do good in the following categories:
How helpful is it to its team?
How hurtful is it to other teams?
How little do you have to improve it to be more helpful to its team / hurtful to other teams?
How balanced is it?
The better a class does in all of the categories, the better the class is.