No one knows the 'best' weight for you--but yourself. Beware of trying for some arbitrary number. People who are even the same height have different bone structures, body type, etc. and can be healthy at very different weights.
You are in a healthy weight range, so your goal should be based on how you look and feel. Keep in mind that if you aim for a lower weight than is good for your body, you won't be able to maintain that weight anyway--unless you're willing to follow a spartan diet just to stay at that 'number.'
You might consider keeping everything the same but having smaller portions.
I'd also suggest that if your bullet proof coffee doesn't contain a half a stick of butter or more, that everybody here stop calling it bullet proof coffee. Just say the word butter near the word coffee and it's like invoking the Devil around here.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 180lbs, press 72.5lbs and deadlift 185lbs