I've been using the cronometer app, and done 50% carb, 25% protein and 25% fat (approx).
Depends on your weight but for me that's about 90 grams carb (low carb is considered under 50 but even under 100 is still at the lower end), 40-50 grams protein and 20 grams fat.
I put a 2lb weight loss a week in the settings (usually ends up about 1.5) so that's about 200 calories less a week (than I would need to maintain my weight).
Before using the app, I just did meal planning. I lost weight but then I plateaued. It was only with the app that I could really see what I was eating.
Losing weight is a wierd one, as the more you lose the less you can eat. Seems a bit shit lol.
I do think you need to take into account height/weight. If you need 1,200 to sustain your current weight you would have pretty rapid weight loss going for 800...but you need time to adjust your eating habits so you don't revert back to previous portion sizes, snack habits etc.
Actual low carb (under 50g) is notoriously hard to stick to as once you get into ketosis, if you break it, your body takes two days to adjust and for the those two days your body can't access an energy source. So a big meal with alcohol could have you feeling dreadful.