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Chaos Marines Battalion
-1 CP

HQs
190-Lord Discordant with Baleflamer, Mark Of Slaanesh, TechnoVirus Injector, Gorget Of Eternal Hate, and Flames Of Spite [Warlord]
145-Daemon Prince with Mark Of Slaanesh, Hellforged Sword, and Prescience
135-Terminator Sorcerer with CombiMelta, Chaos Familiar, Mark Of Slaanesh, Death Hex, and Diabolic Strength
470 Total

Troop
50-Ten Cultists with Guns
50-Ten Cultists with Guns
95-FIve Legionaries with Tainted Chainaxe on Champ
95-FIve Legionaries with Tainted Chainaxe on Champ
290 Total

Elites
130-Helbrute with Two Fists, Two CombiBolters, and Mark Of Slaanesh
257-Nine Possessed with Icon and Black Rune Of Damnation
387 Total

Fast Attack
50-Two Spawn
50-Two Spawn
100 Total

Heavy Support
150-Maulerfiend with Lasher Tendrils
150-Maulerfiend with Lasher Tendrils
300 Total

Chaos Knight SHA
-1 CP

Lord Of War
450-Knight Abominant with Quicksilver Throne, Winds Of The Warp, and Cyclonic Lamentations
450 Total
______________________________________________________________________________

1,997 Points. I am well aware that some options (Terminator Sorcerer, Helbrute) could be improved on, but I'm working with models I actually own.

The big question is-what Legion? I've been running this as Creations of Bile, but it doesn't actually DO much for me. I'm leaning Red Corsairs (for advance and charge) but I dunno.
Anyone got advice?

Im a big fan of Iron Warriors for durability

Well, from a fluff perspective: this is absolutely an IW list. And it probably will do quite okay with them as well.

As far as power is concerned: CoB are the current standard for a reason.
They give your units +1M ( RC 3,5 on average ) but increase their value in melee by a lot.
The list is already quite fast ( the other player can no longer just turtle). So dealing with other melee lists is really helpful.

Also there is a stratagem for advance+ Charge, just in case you need it.