What about int=vit=crit build? Good damage and have alot def and mdef
A pure vit can tank with his def, a pure int can tank with his mdef. You end up tanking half and half which can be a pain since by lvl 140, youd have the vit of a lvl 45 warrior and the int of a lvl45 mage, instead of a full lvl83. Your bonus would be the CRT but it procs just around half the time too.