Wow, guys and gals, thanks for the multitude of replies!
I got a bit side tracked, as I realized I hadn't made a Call of Chaos vow yet. So I made one, and Lo and Behold I ended up vowing six units. I guess I'll have to step up my game if I am to become a Warmaster and not a Spawn....
This weekend of course also saw the release of Burning of Prospero, and of course I got a box. I traded the Custodes (minus the banner) for a squad of MkIII marines, because I'll probably never going to play Custodes and with my HH Iron Warriors probably need TONS of MkIII. There's a tinge of regret in the back of my mind, as I love the Custodes models, but financially this was the right decision. Yeah, I'll just keep telling myself that.
Anyway, on to the first of two Night Lords Havoc Squads with lascannons. I used the BoP plastic MkIII marines - what a joy to have them! Curiously these seem to ahve an even bigger empty space hidden in their lower legs than teh MkIV marines. When I drill into the soles of their feet for the paper clip holding pins, there's a jolt of free room after only 2mm drilling. There's also FW NL shoulder pads and the excellent Night Lords trophy bits that a 3d party Russian designer released a couple months back. I opted for Chaos Warrior helmets for them, because I like the feral look itgives them. I'm not quite sure I'll keep this, though...
Banner Bearer

Battle Brother

Weapon Specialist

Battle Brother

Weapon Specialist

I hope you like them! C&C as always most welcome.
Oh, and I also finally made the Champion and Flamer cultists for my Servitor Cultist squad:
Servitor Cultist Champion

Servitor Cultist Weapon Specialist


Replies!
@ dantay_xv: YES! First price for you. But it's not only Riza - it's also the fact that the Riza Government was called the Riza Hedonate - which I made into a Slaanesh-dedicated pleasure cult.

@ Biohazard: It is! Most definitely.
@ Trysanna: Yes! Thanks for naming someone. Awesome name too. And I'll take the bit of fluff along with him 
@ SalvationOfReason: You're so cute. Yes, DS9 featured Riza, but it was TOS that first had Riza. So you got the crumbs, but the cookie goes to dantay_xv....

@ Race Bannon: Why be ashamed? Don't (self-)hate, celebrate!
@ Quixus: No, Bellos Galiko is a name Acquilanus suggested, which I 40Kified. It's Latin for Gallic Wars, and a shameless and slightly corny reference to Caesar's Comentarii de Bello Gallico, his self-promoting tales of his exploits in what is now France and Belgium. Also, that's a propper schooling of Race Bannon.
@ Vairocanum: Cheers! Yeah, I had to, I only saw the two Inquisitorial thingies when I was already painting it, so made something up to factor them into the overarching fluff of the squad. 
@ Lord Thørn: How should I have known Hannes Krichberg = Jack Churchill? His wikipedia page doesn't mention the name Hannes Kirchberg, and I also don;t quite understand the reference in regards to the guy you picked (although I'm known to be a bit dense) - unless it's the fact that Chruchill brought a broadsword to a gunfight and the mini you chose has the biggest sword... Enlighten me! I demand it.
@ Race Bannon: Yeah yeah. Face it, you got schooled! And you outed yourself as a trekkie! High fives ALL AROUND!!
@ Quixus & Lord Thørn: Kirchhügel also doesn't show up on his wiki page. What are you guys blathering about??
@ Knight of the Raven: ??? You've thoroughly lost me, buddy. OOOooooh so you don't like gravguns, but you do use them!?!?!? Why else would you not have them to spare? Huh? Got you there, buddy! 