My strategy is to keep at least one or two stacks of Aetherflow at all times. However, if Aetherflow pops back up and I don't have full mana, it makes more sense to pop either an energy drain or a Sacred Soil and then use Aetherflow to get the 3 stacks back. Basically, you're wasting your potential if you sit around with 3 stacks of Aetherflow and the ability Aetherflow is off cooldown, so it's better to find some use for them.
