An idea ive had about keeping wyverns alive but doing it in a drg type of matter is to have a pet command where you can make your wyvern fly higher such as a super jump like height with the ability to still use breaths but not regular attacks. This would keep your pet out of harms way and still allow you to use it as a healer, I got this idea while the tower farming alkys i could heal my friend from a floor above him if they could get it to work out the same it would be fine.