I upped my fat to 65-70% and keep my carbs at or below 10% and this approach has been my key to success. My protein target is 81g, but about a year ago Dr. Mike Eades in his blog discussed a study of middle-aged women eating a bit more protein (100g/day) and losing more. I've tried both, and the 100g did make me lose slightly faster and makes it easier to maintain, so that is what I aim for. I did try dropping back to 81g for a couple of months, but I didn't feel as satisfied, so I went back to 100g. I rarely exceed 100g because excess protein can be turned into glucose (albeit inefficiently) and I am very sensitive to carbs, but mostly because protein is more expensive than fat.
I don't eat any grains, soy, sugar or frankenfoods. I mostly eat veggies and meat/poultry/fish/eggs, with some (<4oz) hard cheese & 1-4T heavy cream per day, and some berries a couple of times a week. The fat comes from normal amounts in the meat/poultry/fish/eggs, coconut oil (mostly as home-made chocolate bark), nuts (50-100g/day plain/unsalted or in the chocolate bark), butter (ghee, actually, to cut out casein) and my favourite full fat salad dressings and olive oil.
Incidentally, the switch to more fat made it possible for me to eat more calories and lose at the same rate. Originally on PP I was eating ~1450 cals/day to lose 1 lb/wk but was able to increase that to 1750-1800 to lose the rest of the 60 lbs at the same rate and now I can maintain on 1900-2000/day, still 65%-70% fat and 10% carbs. After 35 years of yo-yoing on low to moderate fat diets of all descriptions, the only thing I hadn't tried was very high fat. It turns out to be the optimal diet for my body. I lost 60 lbs effortlessly and continuously on 1700+ cals/day, my moodiness disappeared, and I have been maintaining effortlessly for 15 months (I'd never maintained for more than a month or two in the past, and never effortlessly! - it involved constant hunger & willpower). I don't need willpower to eat plenty of my favourite fatty foods. It may not work like this for everyone, but it is worth evaluating for yourself.
I figured out my BMR and aimed to diet on the number of calories I would need at my 150 lb goal weight so that I would never need to change my way of eating from diet to maintanence. As you can see I exceeded my modest goal and am now settled in at about
your goal weight, a good weight for me, but was never maintainable in the past, which is why I did not set it as my original goal because I was being realistic for a change. All while eating more food and fat than I ever thought possible (I starved on 1200 calories for years with my weight barely moving or stalled and assumed I had the metabolism of a sloth, when I really needed to switch my carb and fat %s).
If you want more evidence that 70% fat is not too much, and in fact can turn many disease symptoms around, check out: Dr. Jan Kwasniewski's "Optimal Diet"
http://homodiet.netfirms.com/
I've paired his amount of fat (70%) with the Eades' amount of effective carbs (10%) to get my optimal diet.