I suggested a larger area for this because the arena is rather small and has no cover/hiding places. Using, as you suggested, the Forgotten lands, would give players the room to fly, use their wits, gives them a chance to flee or retreat.
If playes wanted a team game, like Capture the flag type game, the added room would allow this.
In the past, I have met the "killer" type roll players. Discovered they became bored with the roll game at hand and hunted other players for sport from boredom. They grew too powerful and could not use their skills without a challange and the regular roll play lost its luster. Eventually they either left, or became labled as "Killers" and were banned from areas or the entire world for causing disruption of the roll playing.