I have a small Tyraind army with lots of Termagants and Hormagaunts.  I also have a Carnifex, Genestealers, Ripper Swarms and a few gargoyles  So not much, but if you want to give me tips on where to get more tell me.

http://www.games-workshop.com/gws/content/article.jsp?aId=4900035a