Ugh.....if you have oportunist you could make a decent tank....thing is your survivabibility is strongly dependant on the gear and the bonus str and int gives to your gear's armor rating. Wits and memory will be your dump stats because both are important and situational at the same time.
In theory you could make a strong tank focusing just on Warfare and Necro but you get extra stats and mobility spells from Polymorph, but without a dip in Aerothurge for teleportation spells, it will not be an excelent tank.
Problem isn't survival...its keeping agro. If your tank can't hold agro then he loses purpose. I find the enemy always jump into my backline regardless of the tank being up close.
