I assumed that was the case it just so happens that we're on a time limit though with all the power the Devourer is storing which is why I was hammering home that the undead action allows us to store 3 power per turn which is more than the other actions we have access to presently.As a side note, there is no cap how much power you can store in total. The actions are just limiting how much you can store per turn. If you produce undead for 3 Power for 3 turns, you have 9 Power banked for later use.
Then we'd loose our alliance with the immobile Harsh Mountain though and likely the Devourer would grow stronger by killing him and his people (since the Mountain can't really do offence by itself)Since there's a bunch of people who seem to feel that both attacking now and attacking later is suicide, I'd like to point out that you can also just... leave...
The Sea People are not so strongly settled that they couldn't go back to a nomadic lifestyle and move to the south and thus away from the Devourer.