I did mine at 66 RDM, went 1/2. First go around I went in on Darksday and I ran up to him right away. 5 resisted sleeps in a row despite having capped enfeeb/merits+gear for it. I went on to continue the fight after the 6th sleep landed. Buffed, debuffed Maat, Chainspell > Stone III til' I had to Sleep him for Convert. Needless to say, I ran out of MP at about 29%.. wasn't prepared for the HP/Convert loss due to the initial resisted sleeps :(
Second go at him, I went in on Firesday. Took some Mulsums, Hi-Pots and won it fairly easily.