I am not a fan of tapering, and I'll explain why. Tapering is a fundamental belief among most AAS users in belief that it is necessary to preserve the muscle mass and bring your natural testosterone levels back up. This is a flawed theory though because of your body not being able to turn "on" its natural production until it recognizes an androgen deficit, not just a drop in AAS dosage. Keep in mind that one Dianabol tablet can produce the the equivalent of a full days androgen supply for the average male, so it would be pointless to drop from 5 to 4 to 3 etc. Now you look at the bigger picture and look at the Sust, and Deca driving your levels high, and it will take a complete abstinance from them, and your blood levels to eventually drop to a level to where your body can recognize a deficit (basically NO test in your system). A simple remedy is to wait a week or two from your last dosage (maybe three if you ran deca long) and THEN run your PCT hard and heavy to kick everything on. William Llewellyn really promotes this and explains the theory in his book Anabolics 2006, probably can explain it much better than I

Keep in mind this is my opinion also, everybody has their own.
Here is a link to the order page if you are interested:
http://www.hardcorebodybuilding.net/anabolics2006/order.htm