*'''[ Chaos Chosen]:''' (STD Min5, Max:20, 140pts.) Warriors with +1 Ld and armed with Great Weapons, which is basically a Protector's Halberd without the cool special rules. What's so special about Chosen, then? If they kill at least one model in combat, all other Slaves to Darkness re-roll To Wound until the end of the phase. This is pretty devastating and nowhere does it say that multiple Chosen squads can't affect each other with this. So a good way to look at Chosen is as a potential buffing unit with high damage potential. Don't compare them to Paladins as they really don't like that. Get them into the thick of things and start killing to buff everyone up.
*'''[ Chaos Chariots]:''' (STD Min1, Max:3 120pts.) Our favorite Shock and Awe Chariot got the Ogor Charge rule, big win. And while they seem to want to be taken in units of 1 2 to maximize the number of exalted upgrades you can take, an argument can be made to take a unit of 2-3. A Chaos Lord on Karkadrak (or demonic mount) with an Undivided Mark will give them an immunity to Battleshock (while wholly within 12") and the Chaos Lord's command ability will affect more than 1 chariot. This will maximize the hurt dealt when they charge. The Chariot's innate ability to run and charge once per game will only maximize this benefit and possibly ensure a turn 1 charge. A 12" move, plus a run, plus a re-rollable charge will catch many an unwary opponent off-guard.
*'''[ Gorebeast Chariots]:''' (STD 150pts) Don't get the same movement rule as the normal Chaos Chariots but they have the absolutely devastating Gorebeast to make up for it. The beast is just that in combat and also grants you the nice rule the Skullcrushers get where you can potentially inflict Mortal Wounds on whatever you charge in the Charge Phase. How you can use that last fact to your advantage, well... coughBloabRotspawnedcough.