I've been using the same tactic for a wile now for my chaos. Everyone i play with knows my strategy and can beat it now. I'm trying to think of new tactics and i could use some help. here is an army list I use:
HQ
Khorne lord w/ deamon weapon ............................................140
mark of khorne
Elites
5 Chaos termies w/ heavy flamer ......................................... 200
champ
mark of tzeench
5 Chaos termies w/ heavy flamer ......................................... 270
champ
3 chain fists
2 power fists
mark of nurgle
Troops
10 chaos marines w/ melta ................................................... 220
champ w/ power fist, plasma pistol
8 noise marines w/ 6 sonic blasters ....................................... 275
blast master
champ w/ power weapon, doom siren
8 khorne berzerkers w/ champ w/ power weapon, melta bombs 203
1 rhino w/ dozer blade .......................................................... 75
extra armour
TL bolter
havoc launcher
Heavy support
land raider w/ combi flamer .................................................. 230
3 obliterators w/ no upgrades ............................................... 225
Total: 1853