I beat him a couple of months ago and have my second sub. Even now that I have that, I can not beat him again. If you have a formation that will beat him most of the time it would be of great help. I have 17k stamina so I can hit it till I get it. I just cant seem to find a form that works. I have Sirius swords, chest pieces, 1 Sirius spirit, 3 judgement, and 500 million power.