You mean the bug version in HB sector, or the normal version?
I owned the normal him with 3 Judgment Triads at lvl 50, with all cheats set to the highest difficulty. He died in 4.22 seconds. He didn't even attack, i just mashed the X button. I doubt you can kill him faster than that, seeing as there's a limit to the amount of Strength you can have...
Bug version however....just use Zantetsuken or something to get him yellow, and run the frig away from him. Then spam JT, get him red, and just wait till all your attacks are loaded again. Then use another zantetsuken to get him green, and IMMEDIATLY use JT, since you will NOT survive his giant beams of doom. Not even SC and OM will save you.
Is it me, or am I somehow overpowered? Everything seems so easy to me o.o