Yeah I took Xtreme Tren stacked with SD a few month back for a month. As well as several other PH/DS.
I wouldn't recommend you start off with a harsh ph/ds for your first go...Start with something like H-drol or Epistane/Havoc.
Since its your first cycle, go easy with it, if you are getting results at a certain dosage, there is no need to up the dose and risk greater chances of sides.
An average typical PCT for PH/DS usually lasts for 4wks. Xtreme Tren is unmethylated and dose not effect the liver, supplementing w/ Milk Thistle would be pointless.
Here are your two best possible options IMO.
Epistane or Havoc 6wks
Nolvadex (Tamox.)At least have it on hand.
Test booster (Testofreak)
Supports 12wks (2wks preload, thru cycle and PCT)
Cycle Support (Minimize sides)
6-8g Vit B5 (Acne)
Stim (Energy Booster, fight side: Lethargy)
Vit B6/P5P (Helps prevent sore/itchy nips, estro buildup)
Vit C/Zinc (Immune System Booster)
Taurine (Painful Pumps)
5-HTP (Ease aggression..improves mood; appetite suppressant)
Cycle Support is the only one that I'd deem necessary for a safe cycle, the other supports are optional.
Remember Time On + PCT = Time Off.
Beta Alanine6g, Creatine10g, Citrulline Malate6g
(This is a great natty stack to help increase muscular strength, and endurance. Start using this after you complete the PCT.)
Feel free to PM if you have any further questions.