I would start by probably by getting clearance on thyroid before self-medicating. I don't know anything about your wife, but estrogen, birth, women -- all of that is basically leaving whacked out body chemistry. Things like postpartum thyroiditis have potential to be in the equation. Make sure you're starting from a normal point before you start screwing w/ foundation hormones. Get a blood test and clearance from a doc that everything is stable.
Honestly, I'd just not go there w/ the t3 -- just because of all the chemistry still trying to settle and also that it tends to metabolize everything - fat & muscle. Most people don't recommend running it w/o an AAS because of the catabolism. And I don't recommend throwing steroids into the mix for your wife. Please have her do some research on use of t3 for weightloss.
NYC - granted they changed the "really good" Adipokinetix around 2002, its still a stim. It matters more how well it works w/ her body chemistry. Some stims work great for one person, and make another person sick to their stomach, or anxious, or whatever. Also the amount of stim - whatever she ends up using, go by HER RESPONSE, not how much you can take. Its not important to jack up the dose. Particularly w/ stuff based on Y because it very commonly can make you nauseous if you take too much of it. (not too hard to research: http://www.ehow.com/about_5476210_yo...s-muscles.html). "Too much" doesn't have to be a lot. I know I've felt my stomach feel like it is a fist knotting up if I use too much.
I'd really start w/ just getting a solid & consistent diet & cardio / training program going. Be very conservative w/ anything else and have her pay very close to attention to how she feels. For ex, stims shouldn't be interfering w/ getting good sleep or adding to the daily stress / anxiety levels. T3 at those doses is generally not considered aggressive - but get the blood work done first as her body can easy need on the order of a year to get everything back to stable levels after a pregnancy.