I don't think the Mill is designed for this use case, exactly. Optimizing peak performance per watt is very different from optimizing for low power. The latter

I don't think the Mill is designed for this use case, exactly. Optimizing peak performance per watt is very different from optimizing for low power. The latter would be dominated by shutting off circuits, different sleep states, lowering leakage and voltage, etc. Something like a GreenArrays chip might be a better fit for that direction (though very unconventional).