I would strongly suggest going to
www.warseer.com and look at the tactics threads
For Khorne, I would personally suggest 3 groups of two Obliterators (or maybe mix some predators in with them), 2 winged Daemon Princes of Khorne & as many berserkers as you can fit in (I would suggest minimum 4 full units). With the new 5th edition out in June the foot troops will be able to run & lack of transport will be less important.
Yes it lacks mobility, yes it lacks sophistication! But your Khorne! Rush straight forward, get in close with the opponent… and let the slaughter begin
Blood for the Blood God!