A few comments on the cycle.
1 - You mean 50mg per day (not per week) right? If so, then yes, 50mg per day for 3 months is fine. (Arnold apparently was taking 150mg a day).
2 - Regarding the Nolvadex, not everyone needs it. But for anyone getting sore nipples, or gyno, its good to use.
3 - Clen - the dosages you mention are a bit high. Half that dosage is fine, and in fact I would start low, and increase it a little each week.