Orbitnutrition has good stacks pre-made. I bought ephedrine and caffine pills separately for the last few yrs and this pre made stack is niiice. And pretty cheap.
Have had really good results with clen/T3 combo. Actually running Clen on alternating weeks with ECA at the moment along with Test and EQ and I am shredding fat!
HONESTLY unless you are a super heavy or close and are competing I personally don't think clen should be used at all for anybody else. It's just not needed.