I can't seem to figure out (and I couldn't find it in the manual, maybe I didn't search well enough) the attack algorithm for monsters in the following situations:
1) when there is an opportunity to attack multiple units without moving.
2) when there is an opportunity to move to multiple units.
3) when there is an opportunity to fly to multiple units.
It seemed that flying units should be prioritized for attack, but this is not always the case.
I don't quite understand the question. Are you talking about auto-battle mode? It would be better to consider a specific situation as an example. Please provide a screenshot.
Sincerely, VDV_forever