also im not sure your alliance will survive that , you cant ask your members to stay active when they will get rolled indefinitely while VE etc can just boost there members when you attack them or even worse keep 3 or 4 nations in range to hit you constantly while they get money for it for that they will be able to use to outgrow you
but maybe the cheapest way to deal with it longterm is to pay argh 500K a week or however much it is now to just raid you constantly and when you are low enough how will you survive ?
i truly think surrender is the only viable option