3. There are 3 ways to use Aetherflow charges: energy drain (decent damage and mp return), Lustrate (instant heal), and Sacred Soil. You should judge accordingly. In 4 mans, there is little need to use Sacred Soil, but it should be the priority in AoE damage fights. Lustrate does not save you as much mp as energy drain + Adlo, but it's a frontloaded and instant heal. So judge accordingly. If people are not receiving burst damage (i.e. when Adlo/Physick suffice), by all means use charges on energy drain. However, be prepared to miss up to 1/3 of the attacks in Coil due to low accuracy. Hence the recommendation in the guide of avoiding this method and stick to Lustrate/Soil.