never used t3 but hear it works great.
I think strongest to weakest in order is...
Dnp, gh, tren, t3, clen, eca, var, otc shit
i have not used dnp, t3, or gh, but from a few people who have used it this is what i've been told.
Keep in mind that most people combine 2 or 3 of these for some serious fatburning. The best way to burn fat though is seriously doing cardio in the am when you first wake up before you eat. And diet must be spot-on, otherwise you shouldn't even be thinking about a fat burner.