3 months is like double the maximum cycle duration recommended with oral steroids, and 6 months is also way too long for a steroid cycle (3 months on test + 3 months on anavar). You should be taking them together, and keep the over all cycle duration at 12 weeks. Do anavar for the first 6-8 weeks, and testosterone for the entire 12 weeks. Don't forget to use a good liver supporting supplement, such as N2Guard, because anavar is liver toxic. Also, make sure to use an AI from the first day of the cycle. Aromasin is the way to go - 10 mgs EOD.