I haven't played 40k since the late 90's when I played Dark Eldar. I remember how fragile and shooty they were, and wanted something a bit more aggressive and didnt need so much worrying about. I decided to go with a KDK army that utilizes a Bloodhost Detachment.

SlaughterCult
Chaos Lord w/ Kor'Lath, Collar @150
Possessed w/ Rhino, Dozer Blades @190
Bloodletters x8 w/ Bloodreaper, Banner of Blood @105
Bloodletters x8 w/ Bloodreaper, Banner of Blood @105
Bloodletters x8 w/ Bloodreaper, Banner of Blood @105
Bloodletters x8 w/ Bloodreaper @85
Bloodletters x8 w/ Bloodreaper @85
Bloodletters x8 w/ Bloodreaper @85
Bloodletters x8 w/ Bloodreaper @85
Bloodletters x8 w/ Bloodreaper @85
Chaos Spawn x1 @32
Chaos Spawn x1 @32

Gore Pack
Chaos Bikers x3 w/ MeltaBombs, Melta Guns @101
Chaos Bikers x3 w/ MeltaBombs, Melta Guns @101
Flesh Hounds x5 @80
Flesh Hounds x5 @80
Flesh Hounds x5 @80
Flesh Hounds x5 @80

War Engines
Soul Grinder w/ Phlegm Bombardment @165
Soul Grinder w/ Phlegm Bombardment @165

I think an MSU army really pairs well with the Blood Tithe system of KDK. This army, on its own, has 21 individual units in it that can generate blood tithe, an extra 1 blood tithe per turn from Bloodhost, and 13 Champions to generate more tithes. This does not include all the tithes generated by killing enemy units.

The main idea is the Chaos Lord is pretty much naked and gets slotted into the Dozer Rhino with the Possessed squad. They will run up behind the wall of flesh Hounds, with the Chaos Bikers on the flanks hunting armor. The Soul Grinders will pie plate any units trying to screen their armor, and serve as my AA. All Bloodletters start in reserve, and the Chaos Spawn play the backfield capturing objectives.

Hopefully by turn 2 or 3, all bloodletters are engaged in melee, with whatever remains of the flesh hounds and bikers. Also, looking for the sweet Kor'Lath Thirster to pop, while summoning more Thirsters or Bloodletters with the tons of tithe I will be generating.

Any thoughts or glaring weaknesses? I just built this army as a starting point for collecting again. I would do much more tailoring depending on my opponents. This is a generic casual list.