i beat him earlier today (4th try)
black frost was a great suggestion (thanks debaser). mind charge plus agilao hits hard
basically whatever wall he puts up will be the attack hes gonna use (red wall=fire attack, so you will block with those weak against fire and pummel him with the rest)
whens hes rebuilding his defense focus completely on attacking if possible, status effects can be a real pain though.
If you let anyone have fear too long he will use ghastly wail which means instant death to those with fear. me patra helps a bit with fear, use royal jellys to heal enervation otherwise your sp will be sapped in no time, but you dont have to worry about that if you dont let him rebuild. If he does rebuild perpare for gigadyne to fuck your party up. you can take him I beat at lvl 43