You could run them both for sure. However, an AI rep once ran PCS and 6-OXO for a much more suppresive PH cycle, and had blood work down that showed impressive results. He ran the PCS for 4 weeks, and then ran the 6-OXO for weeks 5-8 ramped down 4/3/2/1 each week. The idea for running the 6-OXO weeks 5-8 is to prevent any estrogen rebound.