PISORF would be way cheaper than flames if you don't take MA's spell reduction and can get someone to bang him into.
Also, if you go flames -> pisorf then the burning from the 1st flames ignites, reducing 3 death protections from 2 spells (costing 10 total with or without MA's thingo).
It is hard though, especially since you need to find BURNDAYRAZ before you can start.
edit: I like the layout though. Dragon isles cross shifting sands.