I understand - they're pretty weird for Aengudaemons. They're pretty old lore and from what I gather had their aengudaemonic status shifted around quite a few bit.
I think the best thing to do would be to consult with Cam and others, like you said. He has many interesting ideas about Widukind and such, and I think that's the Old One that needs the most careful attention because of his importance to Xionism and Sorvian Sculpting.
I will admit I'm quite biased towards him, as I think the idea of a Daemon that tried to descend to the mundane fully and became anchored there to lose his status is dope as ****, and the weird interplay he's had with mortals has been fun. He's IRP responsible(*Or So I've Been Told) for a very large number of important server lore events (Which may now be dubiously canon given Cam has been off the team for so long.)
Most of them do need a deep rewrite. Blood doesn't make much sense, Poison doesn't, and though I like the Sword conceptually it might be a little too similar to the Sword of Horen thematically. Feldamfir and Dresdrasil just sort've exist