One thing about hardcore min/maxers is how often they are wrong in CoX.
For example, Defenders look under powered compared to other classes. But an all Defender team can out perform almost any other team. And if you get all kin/ defenders then insanity ensues.
That being said, scrappers and brutes are probably the best soloing classes. And I will now go hide so I don't get beaten up for making such a gross generalization.