Might not be the most popular answer - but why not mine Ethereum or Bitcoin? Or maybe something smaller like Stellar Lumens?
Crypto mining is widely regarded as taxing on your hardware and consumes a good amount of juice. Small additional ROI that you wouldn't get by just running furmark.
I think as ROI is a prominent metric for mining, you'll find a wealth of resources that will answer your exact questions on enabling/disabling/scaling in line with an external value like unit cost of power.
That sounds like a much better use of the compute power.
Glad you found a workable solution!