What a beautiful boa! I absolutely love her colors! And I definitely know what you mean about their strength; my boa can easily cut off circulation to my hand when she wraps around my wrist. They're powerful animals for sure.
x2 When it comes to boas, a slow feeding schedule / smaller food items weekly is by far the healthiest way to go. I think yours could handle medium rats, but if you choose to go that route, I would slow down the frequency of feedings. When my first boa graduated to medium rats, I slowed her down to 1-2 feedings per month. Bci have potential to be fairly large, but this should happen over the course of many, many years. Yours will reach her genetic potential eventually, but if you start stuffing her with food, her lifespan will be significantly decreased.