Loving the scheme, particularly on the wraiths and overlords. The one thing I'd recommend is maybe a subtle highlight on the black. I've recently discovered Dark Reaper grey, and it makes for great tone against the black, especially with the blue you have in the chime.
Thanks, I've noticed some models take more 'blue-ening' than others and the ends result is a bit more eye catching. I feel like my sword and board Lychguard will look pretty cool with their shields and bright blue swords when I get to them.
I've been thinking a lot about highlighting the black, my spouse is a painter and we were talking about it just last night. I left it out initially because I was tearing through the army trying to get it ready for an 'important' game (much like my current painting kick) and the shine left on the black after a coat of nuln oil catches the light quite nicely while they're on the tabletop. Now that I'm getting to models like the Overlord though, who loses a lot of detail when painted this way, I'm feeling like I need to reconsider. My main problem with edge highlighting black with grey is that it doesn't ring true to my eye so I have a really hard time controlling where I put it. Had I based the model with a blue/black colour and washed it black to create a gradient I'd be pretty happy with it but alas, here I am with a model painted solid black. Dark Reaper grey is a solid suggestion, I may very well end up just doing that and being done with it; keep it simple here and save the scrutinous detail for my BA elite selections and their endless bling. I'll figure something out eventually.
Up next: my death ray so I can run a Doom Scythe on Thursday. Bonus marks if I finish a Wraith with whip coils to fill in the last couple points in my 1500 point list (whip coils on one Wraith in the squad would take me up to 1498, otherwise I'm at 1489).