I just did it, lvl 74 then. I used half a inventory of lobs, i brought full rune, zammy robes as armour and the usual stuff, elemental shield or whatever. The about 50 bloods to be safe, or round the same amount of deaths. 50 arrows - addy, a D scimmy, MSB and that was it. No pray pots used. Just switch to the mage armour when he is the right colour, and you will be mostly maging him since the majority is magic spells as a weakness. Pretty easy.