Well u can use SoCs for Crit bug, just reset ur critskill u get on lvl 61 lots times and everytime u reset it ur dmg from the crits goes higher and higher....gone after relog!
But its fixed on 99,99 % on privat srvs cause its very old.
So i think what u saw was a knight that was reseting hes first critskill what he get on the first or second skillmaster,dunno exactly now sry.
This bug isnt fixed on lots srvs. There is still a way to reset ur lvl 61 skill but dunno if this is a help for u,u can find it here:
Greetz