I've tried everything. I've swapped around Drachen/Wyrm Armet. I've tried wearing all "enhances effect of wyvern's breath" gear (Armets, Torque, Glassblower's belt.) I've tried using mutiple weapon skills (polearm/sword/staff). I've tried NOT wearing any Wyvern breath armor. Hell, I've even tried dismissing and recalling my Azure. And I still can't ever get her to use the breaths that our periapt is saying will stagger the fiend. A prime example;
Today, not even 15mins before I wrote this post, my linkshell and I were fighting Cherufe in Batallia Downs. Two of the stagger hints, right off the bat, were wyvern earth/wind breath attacks. Ok. Cool. So, trying to proc it, I run up and use Smiting breath. Azure uses Frost Breath. Figured I'd have to do it a few times, but no. Every time, constantly swapping gear around and using Deep Breathing when I could, and all my Azure used that entire fight was Frost Breath (with the exception of one Lightning Breath which I have no idea how because it never did it again afterwards.)
Please, for the love of god, split Smiting Breath into multiple commands like Maneuvers in which we can force the correct breath, or just remove the breath staggers of Wyverns entirely... Please...
(Example of split)
Have all attacking breaths share the same recast timer, like Maneuvers. Can keep the 1min recast timer or even extend it if you must to keep the game fair.)