Right you know the drill. Basically, you save the overlord until you can pay his ability to pull slivers as well as play that sliver. Then you pull and slap the Crystalline Sliver
into play. If you need more mana you can pull out the Gemhide Sliver
and then tap your slivers to get out the crystalline. As soon as you have those on the field you just have to pull out Might Sliver
and Shifting Sliver
to more or less ensure victory. The changelings increase the army, and all the leige's are there to provide additional boosts.