this may sound crazy
Do as much cardio as it takes. Not the answer you were looking for maybe? Track it your body weight, measurements, and take a before and after picture over a month's time using more cardio and then the next month do less cardio and compare. I realize this may take some time and that diet will be key. You must be diligent about weighing/measuring your caloric intake, getting enough protein, and avoiding white stuff (flour/sugar/potatos.) Don't eat too little. This can be a major problem too. Add your bmr (basal metabolic rate) to your activity rate (its easiest if you use a heart rate monitor I'm assuming you have one.) and then subtract about 500 calories to create that deficit while you are concentrating on the cardio rotation. I have never really focused on gaining muscle. It just sort of happens for me (its a hormonal issue) so as for nutrition on the rotation I really don't know what to tell you, maybe some of the other gals can give you better advice for that.
I noticed a major fat shift on my thigh area when I added intervalic running.
one idea:
M Cardio 45 min. Interval style (step, cycle, or wog) use 15 min. of yoga to cool down. HIIT seemed to improve endurance but just a variation seemed to improve my behind more.
T weights (do you want to do a ckt or full body? or splits?)
W off or cardio (up to you) or yoga (longer routine, maybe off yoga today, its free and different episodes are posted often.)
T weights
F Cardio about 60 min. (steady state) Yoga to cool down.
Sa KB (seems like a full body wo to me, I guess that depends on your point of view.)
It just seems to me that yoga/cardio go hand in hand.
If you know all this stuff, please forgive the mild well meant rant.