If you are looking for enhanced libido, I can't see this being a disappointing stack.
Keep in mind that formestane is so potent that it frequently overshadows test boosters. You might want to stack your test boosters and the bridge into formestane to kick it up a notch.
Or start off with formestane and then bridge into your test boosters so that your bedroom performance drop off (back to HUMAN levels LOL) is less traumatic.
Also consider that with my first suggestion, if you get any nipple irritation/sensitivity with the test boosters, the form will take care of it fast.