Hey, I intend on attending a 2250 point tournement later in the year and created this list for this, I still need to drop 89 points and I'm not sure where from!
C@C welcome.

Exalted Champion, daemonic steed, Mark of Slaanesh, shield, Axe of Khorne. 215 points

Exalted Champion, BSB, Glaive of Putrification, Steed of Slaanesh, Favour of the Gods, Bronze Armour of Zhaark, Mark of Slaanesh. 210 points

Chaos Sorcerer, 2x dispel scroll. 135 points

14 Warriors of Chaos, Mark of Slaanesh, Full command, war banner. 289 points
14 Warriors of Chaos, Mark of Slaanesh, Full command, Blasted Standard. 314 points

5 Chaos Warhounds. 30 points
5 Chaos Warhounds. 30 points

4 Trolls. 180 points

5 Chaos Knights, full command, Rapturous Standard, Mark of Khorne. 300 points
5 Chaos Knights, full command. 250 points

Chaos Warshrine, Mark of Tzeentch. 150 points

5 Marauder Horsemen, musician, flails. 81 points

25 Marauders of Chaos, flails, full command, Mark of Slaanesh. 155 points

2339 points

You could exchange the demonic mount for a steed of Slaanesh or a simple steed saves a few points as well.
If you need more serious cutting after that you should probably drop a troll.
You could drop a rank of the marauders as well.

You could also drop the mark on the war shrine. I have found the extra ward save to be fairly pointless. 4+ ward generally gets the job done and anything more is fairly excessive in any non gunline crowd.