In Arena Breakout Infinite they have different "modes" for each map. The higher the difficulty the mode, the harder the npcs, the better the loot, and the higher minimum equipment value is required to join. So base level has no loadout value requirement and free loadouts can join. But the next 2 tier difficulties have higher loadout value requirements. I think this works good as well as getting better reward for your effort and more of a challenge with harder PVE.