Erizon
Perhaps make any Kitin Invasion teams level-appropriate for the zone they're invading. Then bands of noobs would have a chance against them. And if they wanted to wait for a higher-level player to clear the place out, it wouldn't be a long wait in many cases.
wouldn't work. 1-2 masters would port in into the lvl50 and 100 zones and kill the entire thing before the low level players even knew what happened...
That's a fact of life with an open world without level limits on the zones you can enter.