If you're using t-3 then use it constant...no some days on some days off...this will cause an unnecessary rebound effect, one that's completely avoidable.
Although I'm not an ephedra fan at all, you can use it with the ephedra...no big deal.
Dose, start at 25mcg/ed and ramp it up 12.5mcg each time you go up...you should try not to go over 100mcg/ed, no need, plus this is when you start playing with fire, when you go over 100mcg/ed.
Do not drop the t-3 right away from your high dose level, but rather ramp down and come off slowly. Do this and you should be fine.