So...as there is no actual figure for a Diabolist, I've decided to cobble one together. While no green stuff should be necessary, should being a key word, I will be hopefully cobbling this together from several different parts. The one picture we have in the Istvaan collections looks pretty neat so I'm going as close as possible to it.
So first and foremost, the legs. http://www.hoardobits.com/40k/da/DA-VETS-BODY.jpg
Going to be one of the standing ones, so I don't have to do any extra modeling to make it look like MKIV armor. Saves me a little bit. The only issue is that I'll have to lop off that back plate, since I'm going to put one of the Forge World MKIV Word Bearer's Chest pieces on.
The head will be one of the Raptors/Warp Talons heads that have the MKIV grill but have the helmet pulled back into the horns. And left shoulder pad will also be a Raptor/Warp Talon, along with a Lightning claw. The right will actually be one of the Grey Knight's. The backpack will be a standard CSM backpack.
The only issue I have is what to have for the other arm. Any ideas?
Also doing a Cataphractii Praetor with a power mace, gonna use the Deathwing Knight's Command. Should be pretty cool.