SD is harsh, and you're probably not ready for it but i assume you will do it regardless.
Dosage: 20/20/20/30 or 20/20/30/30
Best thing here is to listen to your body and be prepared to increase or decrease the dosage as necessary.
PCT: Torem or Nolvadex + DAA
Supports: Antaeus Lab's Aegis (gold standard), NAC (probably doesn't do as much as people think), cycle support (overall health benefits)