Hey bro,
The Sus250 alone will be a good cycle, granted some people would say differently, but I have done many of Sus only cycle and have always gain around 15 pounds that I kept. I would not work your way up to two shots a week. Go ahead and do 2 week from the start.. Monday/Friday You will see go results just make sure you are getting around 2 grams of protien per pound of body weight and eat a lot.. Just a suggestion on my part, you say that you are at 15% bf. On my last cycle of Sus250 only I gain 13 pounds that I kept and went from 13% bf to 9%. I still at a lot, but I ate very clean and did cardio 3 times a week.. So people will say you shouldnt try to lose the bf while bulking, but you can.. Find out how many cals you need daliy and then drop that around 300 cals or 400. But keep the protien high. You should grow like a weed. Also make sure that you have anti-E's with you... I only really have used nolva and provion.. But I always take 25mgs of Provion through out my cycle.. I dont care for the water weight... I hope this helps.
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C