Just a few things that I observe
2 Icons is alot of points to tie up, ESPECIALLY at 1000pts. You really shouldn't need two, and if your going to take any, you should put it on the Crushers for wound allocation purposes.
If your taking any Pink Horrors, there is no reason to NOT take the Changling...ever
10 Plaguebearers is a bit much, 7 is really the most you should take per unit since (seeing as you don't have squishy troops to play meatshield for) their main purpose is to camp objectives.
For a DP you should pick Mark of Tzeentch or Iron Hide, but both is a bit of a waste. For a TzeentchPrince I would pick up bolt and/or gaze to make use of the DPs high BS