Pretty sure we made the rule before i took my hiatus that you can only defend territory, not claim any rewards without player character present
What is the point of that rule? Like what's the purpose, what potential abuse does it limit?
Also what prevents Kallavan from going there, the ship docks, he stays in his onboard office while the NPCs go out to the island.
If anything that's the most natural thing to do. Otherwise the only times you get to use your NPCs is when your PC is there fighting, but at that point they're pretty much useless. No level 70 or 80 NPC can help Sasaki, their power is like nothing next to him, so if he's fighting there's no use for them anyway.