That guide wasn't very helpful.
Knights are not the best because of stun, but they are the best in Tanking.
Assists get stun waaaaay before mercenaries, and so can psykeepers (I think)
Please, go back to school and learn spelling and grammar once more.
Blades are not the best 1vs1, because everyone's basically good at 1vs1, it depends what build you have. I'm not considerably the best at 1vs1, I kill faster when I AoE.