I've got some great info on my blog about your dilemma. You may find it helpful
Now to your quesiton(s): you don't need to carb cycle. The only time that you would want to consider carb cycling is at low body fat levels and when you're trying to 'lean out'.
My suggestion would be to make your diet at least 60% protein; make up the rest with 25% fat and 15% carbs. You want protein to be your base. One reason is satiety; another is its slightly higher thermic effect relative to other macronutrients.
Just a clarification: You are 349 lbs, correct? Assuming that:
Losing weight is about a calorie deficit, but you are in a major deficit. You can lose plenty of weight @ 3000 calories/day. Try eating higher calories on lifting days and lower calories on non-lifting days. I'd also employ intermittent fasting. Consider your calories on a per week basis and keep it under 21,000/week and see how that works.
Let me know if I can help further.