I would like Arkadia has a mob which is like Vulcan on Next Island: High HP and do burn/penetration damage. This will attract following hunters with armor: Angel, Eon, Hermes, Salamander. Don't make it too hard, but still have decent damage. I love hunting Vulcan but I like to stay on Arkadia too. It's great if Arkadia has the same mob like that, so I don't need to travel alot.
Oratan aren't grinding mobs... too much damage, too much regen, too much overkill. More appropriate for missions and team activities.