Which Knight of Cygnus has top DPS?

Strikers are definitely up there, what with Lightning Charge and a real critical.

Well, three of 5 Cygnus classes have an innate critical skill. Soul Warriors don't, but they are probably the strongest solo 1v1 attacker, so it's hard to say. Flame Wizards don't even come close and are the only class that can be completely discounted.

It's really difficult to say without exact data on how fast the skills are and how certain skills work.