http://imgur.com/3csAFrT
As you can see in the picture, im below 35% and I got my Second Wind up (notice that I do NOT have the Second Wind talent, but the Impending Victory one)
You can also see that my Impending Victory is on a 4 second CD prooving that thats the active talent.
How did I manage to do this?
To be honest, im not 100% sure, BUT what I know, is that I was in an arena match, with the talents you currently see on my tree. And while we waited for the round to start, I respecced to Second Wind, and before we lost, I left the match.
I went to ICC shortly after, with the talents you see on the picture, and I noticed when I got below 35%, my Second Wind procced.
TL;DR - Respecc from Impending Victory to Second Wind while waiting for Arena to start, and then leave after its started.
Note: I've only tested with respeccing from On-use talents to a passive talent as a warrior, so I can not confirm for any other class, so I would appreciate if anyone else could do so![]()