Seems Wind I is useless now

[Rameatz]

I understood the post fine, and as stated I disagree.

This can also be cemented that the cast is longer than a GCD, so it averages out.

Stone 3 (210 potency) is simply worth more potency than Aero 1 (200 potency.) Both spells use exactly 1 GCD, no more, no less. So your GCD's used to DPS are simply better to be used on Stone 3 than Aero 1 in terms of pure potency. DoT or not DoT. Healing or not healing. But to be fair, this is not considering the Spell Speed bonus on DoT damage, as I don't think we're too sure how much the effect is.

There are definitely uses for Aero 1 even if we consider it as just 200 potency though. It's an instant cast, which allows you to use it while moving and it allows to smoothly weave Fluid Aura right after you cast it without taking up free GCD time. Also, if strict MP conservation is an issue, Aero 1 uses less MP and provides better MP-to-potency worth than Stone 3.