Assuming GC spam, I found holy to deal incredible damage against him. Remember to bring Conquerer's and Demon's periapts to deal with him faster.
Putting down 3 GC enchanted with Holy, and using 4x Conquerer's/Demon's, it would probably take at least 20-30 seconds, if uninterrupted, to kill him. --- Official Omega of the Dissidia 012: Duodecim Board. Topic Hijackers of the Dissidia Duodecim Board! Number of members: 2