i had a critical build , but first of all don't work on a LK or Pally since they use endure i don't know why i have asked many people but endure make you hit normal , and i used to have 136critical and still doing normal dmg most of time(it makes me angry)and after all critical build = low hp = no survive full asura(even with F.shield/usa 2dev)
and i used to have 230k hp
but atleast you can fight 1 vs 1 every sinx in the server if you get timing at ygging it can be good.