[mayegelt]

Ok so looks like you have a bit of everything in there.
It is slightly out of date, but in general is still current, espesailly with the corrections at the end.
http://www.40kforums.com/vb/showthread.php/46185-Chaos-Daemons-Tactica
This gives you some nice basics.

Personally i would advise Soul Grinders as they are really really strong. Nurgle one are great if you have cover to hide behind and Tzeentch is now very good if you can support it with spell in malefic that gives all daemons in 12" +1 to the invun save. This can easily give them a 4++ save with rerolling 1s.

Another good option is hounds of khorne as mentioned they are fast enough to get in to combat quickly that can stop people from shooting at you, but also with S4, T4, W2 they are good at being able to take a bit of damage as well. But more importantly they will happily eat most tanks from repeatedly glancing hitting them.

A lot of stuff will of course depend what you are fighting against, but with many daemon armies you need to get things like bloodcrushers or beasts of nurgle to go up the field and absorb a lot of hits for you if they can.

 

[mayegelt]

Remember you now have 4 fast attack units, so are now 2 separate Force Organisation Charts.
Also Great Unclean One is a very very slow moving MC as he cant run so that is a max of 6" a turn though he can charge if in range. Though the overall stats are nice and if you can Ironarm from biomancy they become massively stronger and tougher.

Also if going against MEQs you want Phlegm Bomb on the Soul Grinder as it is kinda like a daemonic version of a battlecannon.

Plaguefather is a nice choice to replace GUO though as he has his necrotic missiles.