Well i got a basic army together the other day. i had to equal my friends points, he was playing an undivided chaos army, consisting of 2 squads of normal chaos marrines , a khorne bezerker squad in a rhino, and a tzeentch lord. i can not remeber it exactly tho. i used a 10 man squad of harlequins with shadowseer, a 6 man squad in a venom, and a solitaire.
basicly, the 6 man squad slowly churned it was through the marrines and lord who dident get much chance to move, and the big squad with solitaire, ripped throe the khorne, and backed up the small squad after that, total finnishing them of.
i sufferd alot of casualties, but not half as much as he did, as i did destroy everything. all in all i was quite pleased i won my first games with my halequins, after how hard to use i heard they were, i was expecting a much harder time with chaos!