Remove Aetherflow as an ability.

Energy Drain stays an ability (oGCD) has 3 charges, 20s CD, restores 5% MP per use. It grants 1 stack of AF. Deals damage with 100 potency to target.

Or

Energy Drain stays an ability (oGCD) 60s CD, restores 20% MP. It grants 3 stacks of AF. Deals damage with 300 potency to target.

Or

Energy Drain becomes a Spell (GCD) has 3 charges, 1.5s cast, 20s CD, restores 5% MP. It grants 1 stack of AF. Deals damage with a 390 potency to target.