When you cross the zone border, the mob should be waiting for you on the other side, attacking you as your computer is loading up. Then he'll do some knockback attack that will cause you load again that gives him more time to pummel you.
And if the paladin pulls the mob first and runs away, but he happens to get ahead of his teammates, his teammates should get attacked and picked off. Threat based on proximity when everyone is fleeing.
When a beastman sees you attacking one his fellows, rather than waiting in clumps linking over to die slowly, they should all come over at once. Beastmen should be behind the fortifications using ranged attacks and magic to support that gatekeeper too.
Beastmen from Natalan and the like should chase you as far as the aethryte. Should they get there in a sizeable force, they should kill the NPCs and lockdown the aethryte so reinforcements (or adventurers trying to do their dungeon run) can't teleport to it. So now if you know you're going to die, rather than running to the "guards" and jeopardizing the camp or hamlet, you can divert the enemy to a secluded area and take one for the team. Twelve bless your sacrifice.