Namshiel would love to have Bob if only for the opportunity to really talk about magic with someone who knows what he is talking about.
Also having Anduriel does not stop Nic from trying to get other tools and tricks especially if he thinks all Kemmlers knowledge is still there.
And maybe Bob could work around some of the restrictions of the fallen.
Since Bob isn't one of the Fallen, I think he could work around their restrictions, if there is a work around.
Anduriel is Nic's ear piece to the world, and that is a lot. Few places are closed to him, so with that knowledge, Nic can plan.
Yeah, Namshiel would love to have Bob, because Bob has insights he doesn't have, he knows Harry very well.