im stuck on him too

find weakness of have a healer

At Endor there is a building with locked doors when you get alena and the magic key go
in.You will fnd 3 expensive armours the spiked armour can reflect attacks it casts 9000
gold.Or get to Canalot on your boat it is north of the town nxt to Alena's castle and buy
the dragonscale armour which protects you from fire and ice especially Marquis de leons
cold breath attack.

go to like that sanctuary place and fight liquid metal slimes on the last floor for like
10000 exp each that should give you a level up in like 5 of them. ( you need a boat or hot
air baloon to get 2 it) it's just south of Endor its on it's like own little part of the
island with mountains NE of it and water all around of it. it's just south of Endor i'm
pretty shure you will find it. Thats how I train my party now : Psaro lv 59 Hero lv 68
Ragnar lv 64

go to canalot for the kings appeal, you tell a joke and it ain't funny. Then go to laissez
fayre and get that tom foolery kid, put him at the front of the line. take him to the
king, and he'll give u the zenithian helm.