ive done it before.....i had vincent alive and thts it and then he put his claws in the ground. then as vincent had 7277HP i used a hi potion and he did the lucky 7 thing. then my mp was damaged......then i killed the claws off and vincent attacked for AAAAAGES and finally as i was killed i did final attack pheonix and then like knights of the round a couple times
easy
(i had supershot equipt for 255 hit%
)