Hi Keldrin,
I think choosing a Daemonbomb army will bring you lots of pleasure (even a non Slaanesh one) and lots of wins. How? Well, the diversity of Chaos is plenty.
Personaly, I've been using a Word Bearers / Black Legion bomb to good effect - although I'm still busy perfecting it.
Currantly my list looks like this:
108 - Lord, Stature, Speed, 2CCW, Frag, MoCU, Pers Icon
125 - Lieut, Bike, Dark Blade, Melta, MoCU, Pers Icon
115 - 5 CSM, Las Plas, Inf, MoCU, Icon
110 - 5 CSM, Autoc Plas, Inf, MoCU, Icon
101 - 5 CSM, Hvy Bolter Flam, Inf, MoCU, Icon
208 - 8 Bloodletters
90 - 6 Daemonettes
90 - 6 Daemonettes
120 - 8 Furies
168 - 6 Mounted Daemonettes
115 - 3 Bikers, Plasma, MoCU, Icon
150 - Defiler
1500 points - 55 models, 10 scoring units
As you can see, I've used the best of all flavours. That's what makes Undivided worth considering. Now, were I to choose a Cult legion for my Daemonbomb I'd go with either Slaanesh or Khorne (although an armie based on Nurgles Rot does seem cool). An essential part of a Daemonbomb is a Bike-based Icon. Two are even better. Both Khorne and Slaanesh offer great mobility in Bikes, and, more importantly, have good, fast Daemons. The fact that the above list has 5 mobile elements is what wins the battles - when playing either Khorne or Slaanesh I'd definately incorporate two squads of either Mounted Daemonettes or Flesh Hounds.
The good thing about a Daemonbomb with mobility is that you can very easily threaten two of the enemies flanks - by Bikes and Infiltrators - then watch him choose a flank and summon all the Daemons on the other flank. This way you divide and conquer and you make the opponent lose a lot of initiative by reacting to your plans.
Other than was voiced earlier, I do like Infiltrating squads for summoning. Three is a perfect number of infiltrating Icons I think, place two on one flank and one far away on an other flank. All infiltrating squads I use are cheap enough to sacrifice, so let the enemy focus on distroying them while we focus on reinforcing the most understrength flank with Daemons. Bikes also help here, since they can easily shift the location of the battle with their Turbo Boost move.
Anyway, I just spat out some of my experiences. Do share yours about making your army. Let us know how your fare with it.
Cilithan out...