I'd put Aish as the #1 priority, much, much higher than Cameron.
We already have one of the most potent and best performing forward lines in the competition. This year we were the 3rd highest scoring team (only marginally behind Port) and the 4th most efficient at converting F50 entries into scoring shots. Adding Cameron to a forward line that already contains Tex, Betts & JJ (and potentially Cameron & Lynch) is only likely to result in a relatively minor gain to our scoring potential.
Our midfield, on the other hand, could always do with a boost in class. 2015 will almost certainly be Thompson's last year. A midfield with Danger, Sloane, Crouch & Aish is potentially much stronger than a midfield without Aish.
Aish is likely to cost us less than JC and his presence would add more benefit than JC. That's two damn good reasons why Aish should be our #1 target, not JC.