If I activate a monster group, such as the Kobolds in a 4-player game (6 minions, 3 masters), do I have to finish the 2 actions of one Kobold before I can go on to the next Kobold or, for example, may I move all the 9 Kobolds (first action) and then attack with all or any of them (second action)?
The rulebook only refers to "activating all monsters in one group before moving to the next one".