I use A plate, texture plate, cardstock, silicone mat (silicone baking sheet cut up), cardstock shims (depends on your machine), B plate. The trick to getting a good deep impression is to mist your cardstock with water or water/rubbing alcohol mixture. I use the little mini misters with rubbing alcohol and water and mist it before running it through and I've had great results. I find the Fiskars give better/deeper impressions than the Sizzix ones (Sizzix also makes the plates for SU). Here's a picture of one card I did using a Fiskars texture plate: