Ask Swordfish, next time he is on/if he is on. He has a cycle that he recommends although I can't remember what/if it included T3 or just clen. I know you have to cycle on and off of it or as I and others do just keep the dose at 25 or 50 mcg/ED. You want to becareful this stuff can easily mess you up if you use it wrong or get carried away.
Use during a steroid cycle, preferably a test cycle.
Imo deca, eq, winny, primo cycles arent very anabolic, and you loose lots of muscle with T3. With test you loose much less muscle due to its high anabolic potency.