This may sound like too much but as a way to help defend your island have a force field Coming out of the voodoo hut in a large range that increases with every level. The force field would add no attacking ability and Would both stop stuff from getting in and stuff from getting out. Basically it would protect what's inside until the force field is destoryed. Its benefit would be mainly a time waster. You could do bunch of stuff like pack some gold/grog in there with some fire power as sort of a last stand. Once the force field is destoryed it would have to be reloaded like the mines. There would be pros and cons to using one. For example if you put firepower in it since the firepower cannot get out it is going to make it easier for the attacker at first. Perhaps it would put a bit of spin on the strategy.
For every Attack or Defense there is a counter. What would the counter to this be? Would the thieves be able to rush through the shield?
I think pirates trained from the voodoo hut make more sense. Since skellywag has no real power and is just the undead he would be the exception. But I would say the Witch Dr. and those in his force field could penetrate the force field. Also the priestess would be able to. These two characters make the most sense since they actually have voodoo power.
