The solution to Energy Drain is pretty easy really: Make Aetherflow a resource exclusively used for DPS. If your optimization aspect is managing some combination of DPS resources, and that's the consistent expectation for every use of Aetherflow, then there's no more punishment aspect other than performing your rotation correctly, which is the same expectations every DPS job has.

But what do we do with the resources that use Aetherflow currently? Well, fortunately (or unfortunately) SCH already has a second gauge that has absolutely no uses of notable value currently and is basically just a decoration on your screen at the moment that we can just shift healing cooldowns onto.