I find the low/medium carb, very high protein works best for me. And my "cardio" consists of more like "conditioning" work like tabatas (outed) or HIIT. Weights x 4/week, conditioning x 2/week.
Same. But a high carb day is needed for a particularly heavy-duty leg or back day. After that I go low again for 3-4 days. And my "low" days resemble a high Keto day. I find manipulating your body's glycogen intake stimulates fat-burning more than keeping it perpetually deprived of it.
Cardio, I've tried two methods: The extreme high difficulty kind for 30-45 minutes, with calorie readouts of approx. 700-900 per workout
and the low-intensity, "classic" bodybuilder method of 45-60 minutes with an HR in the 110-120 zone and gradual sweating.
I find both work well but the latter allows me more energy for my later muscle workout. On the other hand, the results are much slower. Nothing gets you shredded as fast as busting out on the stairclimber for a high-energy workout.