You will need the fats when you carb rotate or start cutting carbs just to deal w/ life. If the 1000 cal / day is appropriate for you, I'd guess something like a 50% protein / 30% carb / 20% fat is a typical competition macro ratio. Whatever 20% of your total is you can put into fats, e.g. almonds, flax seed oil. I woudlnt' get on a PB kick if you can help it just because the stuff is like the only fun food on a competition diet and thus becomes the evil unintended binge food.
But generally if you don't get decent fats, it will hurt you while you are running a restricted diet. There is a place for all the macro nutrients. What is the hang up w/ fats anyway? Don't know your metabolism but now I've seen at least 2 high speed metabolisms that respond well to a fat load vs. a carb load and that may end up being one of your best prep tools for show dieting.