Final Fantasy Hacktics

Do you know if there is any way to learn ultimaza omega with ramza? I have spent quite a few hours fighting with the god dragons so that they can throw me Omega Ultimaza according to the guide but they have only been throwing Nova Flare or Mega Flare at me but no trace of Omega Ultimaza or am I missing something?

I ended up discovering how to learn it with the omega knight although it can be a little tedious to learn since you first need the onion knight to learn it and once you have achieved it you have to use it with the omega knight who does not have all of his HP complete since that way He will be able to learn dark holy since you are healing his remaining HP

Is there a way to learn dark holy from the demons with the omega knight? Since they absorb darkness into their base class and end up recovering HP if they receive it, I can't see any way to learn it since they have to take damage unless later you can learn from an enemy by crystallizing it