It looks really good :)

Thanks ^^

She doesn't just look good ;3

Looks good :) I just started playing that game, Its a good time. I was lucky though, I inherited most of my army from an acquaintance for free. I don't get to paint them, on the other hand I don't have to buy them.

How do you make her stand out from normal unit standards?

I used an old style horror champion with a standard made from defiler parts for my Tzeentch horror BSB.
Just about make him out in the full army pic - http://www.furaffinity.net/view/3425353/

Her color scheme, her standing on a rock and a small conversion in which she'll have an extra arm (i.e. the many armed monstrosity gift), which i forgot to do when i painted her, is what I'm planning to do to make sure she's different from other daemonettes.

P.s. Nice army you got there :3

In game effect can be summarised thusly: http://www.youtube.com/watch?v=NOErZuzZpS8

Plan to take a magic standard for her?

Nice song :)

Well I'm not entirely sure cos the other daemonette unit will have a banner of ecstasy. My plan was to keep the herald in the center of the army for leadership tests whilst behind this unit i would have the Lord of Change. My other herald is a Khorne bloodletter on juggernaut with two bloodcrushers with him.

Oh hint: Flamers of Tzeentch. Never leave home without them in WHFB.

I've managed quite well without flamers in my 2K army. It gives me nice big core units to smash through enemy lines.
Screamers are a lot nastier than people give them credit, especially against MSU armies.

Screamers are very handy from what i read. The reason why i wouldn't take large core units of horrors is because of my horrible dice rolls. I'm thinking of replacing horrors with screamers....

I'm a notorious bad dice roller. Level 2 horrors with icon of sorcery can nearly always get flickering fire off. And a herald and they're seriously tough.