We still have Bhaella around, right? How much is she going to object to our actions, big-hearted pacifist that she is?
And how many people do we want to pull into the Westhaven take-over?
And I'm not sure if you saw it when I asked before or not, but unfortunately it's relevant.
@DragonParadox does Westhaven have a
boom/chain across the harbor mouth? They were usually protected by towers, or some sort of fortification, and served to protect important harbors.
If it does, I'm thinking inviting the top officers and captains of the ships in harbor to hear the Admiral's plan for fame, riches, etc. over a late evening dinner. Tyene poisons them (including the admiral) with a knockout poison in the food/drink, for capture and later processing. Use magic to force to sleep anyone still awake.
Two strike parties will seize the ends of the harbor chain (or one party seizes the end, depending on it's set up), and raises the chain to prevent the ships in the harbor from escaping.
If we have enough people, we might also want to seize the armory.
At this point we use that spell that magnifies our voice or achieves a similar effect to declare that we've seized control of the island and harbor, and call for surrender. We also have our constructs fly around, looking for any small vessels that might have been hidden outside the harbor fleeing the island so we can intercept them.
Maybe time it so our fleet shows up around the time of the call for surrender for added visuals, and for manpower to accept people's surrender? If there isn't a boom/chain, then the fleet could also blockade the harbor.