ok so if u go mage u should do this :
MAGE
Enchanter Class(BD,SWS,WC) Chance Celestial(makes you invinsible)
Summoner Class(summoners) Summoner Spirit(increasing your p.atk,m.atk,atk.speed,cast.speed when you being hit)
Warrior Class(Gladiator,Tyrant,Warlord,BountyHunter) Boost CP (increasing your CP)
FIGHTER
Enchanter Class(BD,SWS,WC) Chance Celestial(makes you invinsible)
Summoner Class(summoners) Summoner Spirit(increasing your p.atk,m.atk,atk.speed,cast.speed when you being hit)
Warrior Class(Gladiator,Tyrant,Warlord,BountyHunter) Haste boost(increasing your atk.speed when you being hit or you hit i cant remember atm)
I hope I helped you!