Well, like I've said before, diidothyronine was one of the main ingredients in Lipokinetix, but as far as I know it wasn't what made it so effective. (Usinic acid, the oxidative uncoupler, is what makes LipoK so amazing).
However, since LipoK was basically an ECA stack with diidothyronine and usinic acid, I don't see why stacking T2 with a thermo wouldn't be cool. I'm really unconvinced about its effectiveness, though. Haven't heard any "success stories" from its usage yet.