I made a 1000 pts list on the fly for a fast game before class and it worked out pretty well. I don't have a ton of models and I don't power-game, so feel free to criticize the shit out of it. Especially if I did the math wrong, which is most certainly possible.
HQ>Kharn the Betrayer 160 pts>Nurgle Lord 115 pts
Troops>30 cultists w/ 3 flamers, 145 pts>10 csm, champ w/ claw, icon of veng, rhino w/ dirge caster. Flamer or melta, depending. 190 pts>5 Plague marines w/ plasmas & rhino. 200 pts>10 khorne berserkers w/ icon of wrath, power sword champion, rhino with dirge caster, veterans, and melta bombs. 285 pts
Heavy support>2 oblits with nurgle mark for 76 each
It comes out to around 960 and then I tweak extra surprises from there. Such upgrades include havoc launchers on rhinos or bonus guns in squads. Sometimes I add more plague marines but I usually keep them at 5.
at 1500 points I add one heldrake and another squad of obliterators, or tack more Khorne Berserkers into the squad. At 2000 I actually drop the Nurgle lord and bring Abaddon because I have his model and he and Kharn basically frolic through whatever squad comes into charging distance of them. At that point the berserkers become more for show than anything else.
I typically play against Eldar, Deldar, Necrons, or Space Marines. Sometimes Blood Angels or Dark Angels.
General tactics include playing with cover and drawing enemies into obliterator fire as best as possible and only engaging on my terms. I typically leave my berserkers somewhere that they can hit back armor when that is the best option. This is more easily done against SM because the friends who play them are new and dumb. Deldar raiders fuck with my range so I often tank smash them because that rule is fun as fuck. I've never beaten Eldar as CSM but that's mostly because my friend who plays Eldar is really good.
It's no power list, but I like Khorne berserkers and I make them work.