Ah, that is a different question than the one I thought I was answering.
What you describe is more in the way of pulse-and-glide for the alternator. But that can easily be done by simply pulse-and-engine-off-coast. That way you not only avoid having to power the alternator, but the whole engine as well!
If you're keeping the engine on, then yes--turning the alt on while pulsing is the best. Same for A/C in the hotter months.
-soD
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