Well, it would be a good learning opportunity. Immersive and classic!
[You must be logged in to view images. Log in or Register.] Too many people take the easier paths but yeah, that is a pretty brutal CR.
OP - If you do it, make sure you have a means to levitate and SoW yourself and/or bring someone along.
It looks like paladins get Lull at level 15, so that should help if mobs can't be pulled single otherwise. Critical fails can make for a bad time though. Not sure about pulling logistics on that island though--been a while.