Have blue and red npc mages, dextors, archers etc with skills that match the player base skills, or more more powerful. Scatter all these npcs all over Fel. Have them set to attack any player that shows up on the screen blue or red don't matter you get attacked. Give them the ability to heal n cure up like a player would. Rewards can be figured out later. rewards you can only get in Fel. oh and make them trash talk when a player attacks them.