I just looked online at suggestions (mainly because I am not even getting remotely far with the guy) and lots mention the leg hold trap thief skill. Keep the guy in a constant de-buff along with Olberics team defense buff and break him as quickly as possible to stop his ridiculously powerful attacks.
Thinking about this overnight. I am going to try this party tonight:
Alfyn warrior - Lvl 44
Olberic theif - Lvl 39
Ophyllia Scholar - Lvl 35
Cyrus - Lvl 35 - I forget which job Cyrus has now.
The idea of using the scholar elemental skills to break this sucker as fast as possible, de-buff with Olberic and buff with Alfyn (abide, stone wall etc) - Also by this stage Olberic & Alfyn can both lay down a lot of physical attack damage and we all know what happens when you unleash the Cyrus canon