the only thing that sub quest does is allow u 2 physically hurt him. and since i dont use physical attacks ( flare, shock, thivery, dragons crest i use) it made little difference.

remember any boss that has a chance of instant victory at any point is a tough boss. any boss that keeps using berserk against a reflect team is weak. these r the two most extreme facetes of ozma and why, i repeat, sumtimes as easy as a bite bug and sometimes harder then penenance.