This is what I've run the past 3 games and had a ton of fun with it.
Chaos Sorcerer Lord 260pts
Role: Leader, Behemoth
Quantity: 1
Command Trait: Master of Deception
Artefact: Argent Armour
Spell: Binding Damnation
Mark of Chaos: Nurgle
Aura of Chaos: Aura of Nurgle
Chaos Sorcerer Lord 110pts
Role: Leader
Quantity: 1
Command Trait: Bolstered by Hate
Spell: Whispers of Chaos
Mark of Chaos: Nurgle
Aura of Chaos: Aura of Nurgle
Chaos Lord 250pts
General
Role: Leader
Quantity: 1
Command Trait: Eternal Vendetta
Artefact: Rune Blade
Mark of Chaos: Nurgle
Aura of Chaos: Aura of Nurgle
Chaos Lord 110pts
Role: Leader
Quantity: 1
Command Trait: Flames of Spite
Weapon: Reaperblade
Weapon: Daemonbound Steel
Mark of Chaos: Nurgle
Aura of Chaos: Aura of Nurgle
Be'lakor 240pts
Role: Leader, Behemoth
Quantity: 1
Spell: Spite-tongue Curse
Aura of Chaos: Aura of Chaos Undivided
Chaos Warriors 400pts
Role: Battleline
Quantity: 20
Upgrade: Aspiring Champion
Upgrade: Hornblower
Upgrade: Standard Bearer
Weapon: Chaos Hand Weapon(s)
Mark of Chaos: Nurgle
Chaos Knights 180pts
Role: Battleline
Quantity: 5
Upgrade: Doom Knight
Upgrade: Hornblower
Upgrade: Standard Bearer
Weapon: Cursed Lance
Mark of Chaos: Nurgle
Chaos Marauder Horsemen 90pts
Role: Battleline
Quantity: 5
Upgrade: Hornblower
Upgrade: Horsemaster
Upgrade: Icon Bearer
Weapon: Marauder Javelin
Mark of Chaos: Nurgle
Chaos Warshrine 170pts
Role: Behemoth
Quantity: 1
Mark of Chaos: Nurgle
Plaguetouched Warband 180pts
Role: Battalion