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.
Perhaps also vary the spawn frequency according to when a group with a "leader" is being released. After the leader is killed, which will ultimately happen even if they manage to occupy a town for a little while, the frequency of invasion teams drops to almost nothing before slowly rising again for the next leader.
Perhaps also vary the spawn frequency according to when a group with a "leader" is being released. After the leader is killed, which will ultimately happen even if they manage to occupy a town for a little while, the frequency of invasion teams drops to almost nothing before slowly rising again for the next leader.