5/5 Angon is great. with 2 drgs in the alliance you can keep angon up fulltime on long fights.
Empathy transfers random buffs, and not in the order they appear up top. Seem to remember it used to do them in order so it would almost always give haste, but it doesn't anymore so loses a lot of appeal. My wyvern doesn't benefit from protect or hasso or whm cureskin being transfered.
1 Empathy is still worth doing so you can spirit link @ full wyvern HP for the TP boost. Wyverns usually only get off 1-2 attack rounds per drg WS, but if you're getting hit by mobs and end at 96% or above TP, spirit link should give you enough to WS.

Deep Breathing is more worthwhile than multiple empathy merits unless you always cancel non-DD buffs and always have a bard and/or corsair. Strafe is crap.

5/5 Angon
4/5 Deep Breathing
1/5 Empathy
It's really the best choice. Cat1 is easy, Jump and High Jump.