I think that running all 4 products TOGETHER for the full 8 weeks will give you the most benefits (but that's just my opinion; you may want to ask Jammie or Dirk). When I was bulking, the week (was so short because it was the last week of my 10-week Drive/RPM cycle, and I had just received my IGF-2) that I ran these 4 together was my BEST week during my whole 12 weeks of bulking. I have just done another 3 weeks using all 4 products while cutting, and I have been GAINING LBM, losing fat, and my strength gains have been through the roof! So, definitely think all 4 for bulking (you may even notice that you start to lean out slightly; I notice that the IGF-2 does that to me...)