hi i have got a new army and have played a few games with it but not one any yet (i have come second out of three tho) i think my problem is i dont really have a good startagy the units i have got are

4 units of 12 chaos warriors
1 unit of 5 knights
1 chariot
1 unit of maruder horse men
1 hell cannon
1 bloodthirster
1 sorcer with familiar
1 archeon although my freinds dont alow me to use him as archeon
1 crom
1 deamon prince
think thats all of them

if some one could please help me with a recomended army list for 3000 points or 2000 that would be a big help or just a stratagy i could use i mainly battle vampire counts and beastmen thanx alot