i wouldn't use T3 man. fucking with your thyroid is not necessary unless you are competing at a high level.
i cannot comment on your diet at all. all you said was you IFast. the idea behind Ifasting is that your insulin levels drop during your fast so your body stays off of storage mode. the problem is i notice guys in that eating window eat way too much. it makes more sense in some situation to eat 2 meals a day.. AM and PM. you still get the insulin drop and you will not overeat that day
also in the middle of that you need to accept hunger. hunger is actually your body detoxing, it isn't your body asking for food.. you will notice when you do eat after being really 'hungry' you actually feel like ass after. well that is why .. instead drink a ton of water.. your body wants to detox, so drink water!