I am saddened by the lack of answers after 9 days, and myself have the same inquiry.
I've been reading and re-reading this for nearly two hours...
This is the conclusion I've reached (and if anyone has proof to the contrary, please provide!)
Action: Standard (all wild talents are unless specified otherwise, and this isn't)
Range: Determined by the effect generated. Example: "An area with a radius of CR × 10 feet becomes utterly dark, as if from a deeper darkness spell." which leads me to think it's argument 2, as it says "an area" - implying the area can be decided. There are two arguments to be made;
--- 1) It's centered on the user, but the user can (or must) omit themselves, as they are effectively the source.
--- 2) The center can be placed in accordance with your max blast range, as many other wild talents with range can be improved by range wild talents.
EDIT: Actually, the more I think about it, your max blast range makes the most sense. It clearly should not be "any area that you can see" - as that defies all other abilities, and doesn't even list a range boost talent as a requirement. I'm standing by: "Created up to as far away as you could target with your blast" sorta range
The duration is either instantaneous, or specified by the effect.
As it's generated by you, on demand as an Aether Kinetic, it forces the event rather than creating a zone.
Further, the list presented is generic. Even calls itself a sample.
If you and your GM feel there are things better fitting Aether, can adjust.
That's my two coppers, and the result of hours. Heh