This brief proposes a novel method to determine the best combination of operation conditions for multiple power-scaling schemes. The power saving and rate-distortion performances of individual schemes are simulated, and then, the combined effects are modeled to obtain the best operation combination. The optimized combinations are defined as a power-level table. The proposed power-aware design is tested with four popular power-saving schemes and simulations show that a power saving of ~25% is achieved at the sacrifice of .0.172 dB Bjontegaard Delta peak signal-to-noise ratio degradation.