Did it at level 18 with an Uzume, a weird, hairy elephant ball I just recruited and my High Pixie.
If you try to stack debuffs on him he wipes them off, better to reduce his dodge once and leave it at that. My Uzume also had that buff which means every attack is a crit when there is no "moon" out so she was running a train on his ass, not to mention sapping his turns with null force.
I also had to sell a revival bead chain to have enough mecca to buy the physical attack resist magatama; totally worth it.
I'm never fusing that pixie from the start, I promised her we are going all the way.

