there is a problem that we can't store mana potion or milk exceed the limitation.after our mystic and resilience increase,we need more and more mana potion to recover(even mixed up fairy dust ).so i think maybe a little change is necessary to make.such as raising quantity we can hold or creating a potion recovers us as a percentage to adapt huge numbers.
if the arena in desert can be participate in,i expect a powerful enemy because we have't anything to do except exercise and fight after finish all the events.(for 50 hours)