Confused about Ariks Leviathan.

I have to ask yet another question. Im trying to progress immortality, and ive got to do one of two optipns, and im going with ariks. Its a while since i helped arik, and im not sure what choices i made, except that i cant speak to him in Hideaway and i cant seem to help him out with his last request something something khanagian in wisdom. What should i do? Im stuck at his quest level of 40, and im not too keen on building the weapons, id rather take the leviathan. Thanks!