[the REAL Minos Prime]

The Korvara money and item grind is already painful enough as is; and the prisoner system is only really useful for summoners or people who plan on using mercs. 

We already have two arenas on Korvara, the arena in Duyuei and the arena in the Sanctuary, but neither of them have proper arena NPCs, just healers. I propose adding proper arena NPCs to the Duyuein and Yokoshuran arenas, where you can do battles for arena tokens, purchase items with arena tokens as an alternative to finding them from random drops, and sell prisoners for extra money.

I really don't see why the arena system wouldn't be good for Korvara. It'd be a good way to have an alternative to grinding dungeon bosses while also opening up a flavorful alternative to smacking around wildlife for money.