>>96317086
Good news! The Legacies rules say that chainblades are identical, and they're "chainglaives, but adapted for one-handed use." Which just means they look like chainswords. And they have the exact same stats as chainglaives. No conversion required whatsoever for your terror squads and night raptors!
But yes, trophy racks, skin cloaks and skulls are good to have for night lords. But there's ways around the "cost." GW sells a pack of 340 skulls for $35. Use greenstuff to make spikes, cut a hole in the skulls, stick those fuckers inside of the spikes. You now have trophy racks. Glue them to the waists of your models, too. You can greenstuff skin cloak and skin masks, see pic related.
There are ways to bling them out without breaking the bank