to pvp as mage u need to throw comets at people and they die, from time to time u also need to flash away and use invisibility, to get away but if that doesnt work use illusions and u can tank everything in the game for sometime so u can have you comets and fireshock to 1hit people but if that's still hard enough u can always use icy grave and cast surge your target will die in the end no matter what u try to do