From what I've read Aero 3 was a 2.5s cast so it wasn't useful for mobility.
E. Dyskrasia would've been great for that purpose had it been stackable and same potency as Dosis but we didn't even get that.

Fluid Aura became a Bind in ShB and was finally deleted in EW, with nothing replacing it at that level. I wish they just turned it into an instant cast water spell instead.