Play tested this at the weekend and enjoyed it. Probably needs points checking as it was guessimate.
Chaos Lord - terminator armour, pair of lightning claws & mark of khorne
Chaos Sorcerer
5 x Chaos Space Marines w/ Rhino - plasma gun - Champion w/ combi plasma - Rhino w/ havoc launcher
5 x Chaos Space Marines w/ Rhino - plasma gun - Champion w/ combi plasma - Rhino w/ havoc launcher
5 x Chaos Space Marines w/ Rhino - plasma gun - Champion w/ combi plasma - Rhino w/ havoc launcher
5 x Chaos Space Marines w/ Rhino - plasma gun - Champion w/ combi plasma - Rhino w/ havoc launcher
5 x Chaos Space Marines w/ Rhino - meltagun - Champion w/ combi melta - Rhino w/ havoc launcher
5 x Chaos Space Marines w/ Rhino - meltagun - Champion w/ combi melta - Rhino w/ havoc launcher
10 x Chaos Cultists
Heldrake - baleflamer
Vindicator - daemonic possession
Vindicator - daemonic possession
3 x Obliterators - mark of nurgle
5 x Havocs - 4 x autocannons
5 x Havocs - 4 x autocannons
I know it's a bit 5th ed with the min units, but I've got six Rhino chassis and I want to use them. I would take a few units of 10 if points permitted (melta units), but they do not and I've found eight hulls seem to do nicely. The heavy support works nicely too, as this will be a Iron Warrior army

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Basically Vindicators hold the front and take the flak while others get shielded behind; melta ones will also go at the front too
btw. Vindies and Havocs will lay down support for the first turn while Rhinos move up and fire havocs at infantry or just roll up and long range fire. Oblits and Chaos Lord deep strike together while Sorcerer and Cultists mooch in and grab a easy objective.
The Chaos Lord I am thinking of either adding a mark of nurgle, as when split got instagibbed plus if he comes in turn 2, then earliest he's going to assault is turn 3. I am also thinking about a Nurgle Biker Lord with a power fist. Just need to come up with something cool so it fits a I.W theme.