Regarding the yohimbe, definitely give it a try. Contrary to what was said, yohimbe doesnt block fat receptors, but rather blocks alpha receptors which tend to be found in high concentrations in areas that tend to be stubborn. It's technically not a fat burner - a better term may be a fat mobilizer as blocking alpha receptors increases blood flow through vasodilation. With yohimbe fat is 'liberated' and is now readily available for use as an energy source.
Based on the available research the ideal dose is 0.2mg/kg LBM of YOHIMBINE. Therefore, you'll have to look and see what the Yohimbe Fuel is standardized for and do the math. Since yohimbe is proinsulinemic (will produce a greater insulin response to carbs than would be seen by the carbs if the yohimbe was not present), it should not be taken anywhere near carbs, since as we all know elevated insulin blocks fat breakdown.
Based on work with my female clients, this is the strategy I've found to work best with yohimbe. Use it as a pre-cardio supplement (morning cardio) after an overnight fast. Take 0.2mg/kg of yohimbe with 200mg caffeine (one to be increase fat break down, the other to allow transport) about 45 mins before cardio on an empty stomach. Do your cardio for 30-45 mins and then wait about 45 mins to eat and make sure this first meal is no carbs. Make it just protein and fat. I've had excellent success with this in women with stubborn lower bodies.
Hope this helps.