Here is what i suggested

Chaos Sorcerer
Enchanted Shield, Power Familiar, Mark of Slaanesh, General

Exalted Hero
BSB, Mark of Tzeentch, Talisman of Preservation

Chaos Sorcerer Lord
Dragonhelm, Mark of Nurgle, Level 3

Chaos Marauders (40) x 2
Mark of Khorne, Great Weapons, Musician, Standard

Chaous Marauders (37)
Light ARmor, Shield, Mark of Tzeentch

Chaos Hounds (15)
Posioned attacks

So You have your two sorc's who play off each other well with the lore of Slaanesh and lore of Nurgle, You use the Tzeentch marauders to house your characters and march up the middle or what ever you have to do, Using the lore of nurgle for regeneration, and the lore of Slaanesh To either give your marauders fear, make shooters chase a point or Cause a toughness test on some weak elves. - Good luck happy playing and of course ideas and suggest for whatfruit should run in this tournment is appreciated.