1. If your meals are far enough apart you can spike with some Leucine or BCAA. Add carb depending on your goals (bulking/cutting), but they aren't necessary.
2. That depends on your goals. The basic idea is larger meals, spread farther apart to allow for peaks and valleys in protein synthesis. Within that framework, there is room for different macronutrient breakdowns dependent on your training and goals.
3. I have had success. The last 2 years have by far been the most productive I have had in my lifting lifetime. I eat as little as 2 meals a day (intermittent fasting) and as many as 4. It gives you great freedom, not having to stress about having food every 2 hours.
James 1:16-17 ESV
Do not be deceived, my beloved brothers. Every good gift and every perfect gift is from above, coming down from the Father of lights
With God's help...Mens sana in corpore sano