t3 stack

Ok... i am currently almost three weeks in to my first cycle... Var/Clen but i am have some T3 that i am considering starting... i am unsure of the cycles for the T3 though... I currently plan on running the full cycle about 12 weeks... 2 1/2 weeks 10 mg var 2 1/2 weeks 15 mg var 6 weeks 20...