Any extra points? That's a fair few
The problem is with the Shade that there's so many other expensive options for Angmar, and it's hard to find both troops and remaining points.
Would you prefer a Shade or a troll for some muscle? 2 Barrow Wights? Extra stats for the WK? Extra troops? Gulhavar?
See there's so many options, which is both good and bad. I think that if you take a Shade, you'll need a lot of troops to protect it or it'll fall quickly. That means cutting out on the other gribblies and taking warriors. Which is a hard choice IMO.
Personally, I think I may try one next time I play my mate's elves. Gotta work out how to model it though.