aight it just seemed like the only way of getting stuff like mithril weapons is thru that extra reward at the end of the bonus battle since ive done a lot of normal battles but all I can obtain are good armor pieces and weapons which you can already craft. I guess my luck has just been terrible if you can get those thru normal battles aswell. I mean not like it really matters since you can beat the arena and normal battles with the normal gear quite easily aswell. Also im assuming you mean different loot tables for the different arena difficulties and not multiple loot tables for each arena difficulty since each difficulty gives/drops the same reward everytime.
Havent seen that chest down there yet. Thanks for the advice!
MFG Huncho