if you didnt know you can use some weapons with SA for self buff in olympiad
weapons i use on my fighters :
Staff of Evil Spirit + magic focus
Staff of Evil Spirit + btb
Hell Knife + mental shield
Hell Knife + magic regeneration
equip them after you enter in olympiad and use bandage,self heal and other skills
you can test them before going to olympiad and see how to have them faster
cause the succes rate depends on your stats
have fun and enjoy