I'd like to mention that DRG/BLU can also get Azure very easily on ephemerals. Take em down to 5~10% ish, turn your back/disengage(if you think wyvern is going to kill) and spam physical spells. BST/BLU could do the same but I don't know how much utility you'd get from /BLU overall, dunno if it'd be enough to say that's worth doing. It's a different story for DRG due to the healing breaths though.

If all else fails though, ask someone to help you for a bit and keep soloing after they leave?