Liver protection especially if it's oral cycle- n2guard and/ or forged liver.
Other supplements- lots of creatine- mono and nitrate, good multi vitamin, good omega 3's, fish oils, lots of protein, and hcgenerate towards the end.
^^^ pretty much covers it! N2 Guard, HCGenerate, Need2Slin, Forged Liver & Joint, Unleashed/Post Cycle Combo, Forma Stanzol, Krill Oil, Fish Oil, Vitamin E, C, B12...kind of compiled the lists from above...