Order of acting in battle

[fantasma]

well, if you have for example a reverse communion for evocation and one blood mage to reinvigorate the slaves. If the bloodmage casts before the others, they don't act this turn.

Or, more general, whenever you want your (few) superior masters to buff the (many) cheap slaves or cast big globals and want your slaves to act at the same time.

[Humakty]

I've heard the fact slaves can act is a bug, they shouldn't be able to act at all.
I do never (or almost) use this exploit, 'cause I'm a pure virgin.

[fantasma]

that's right, I heard that too, but then it is hard to avoid that your slaves cast, in the first place.

And there is the discussion in the communion's guide thread where it is explicitly mentioned as one way to get the most out of your battlemagic.

The really broken part is, imo, that the slaves act/don't act depending on an arbitrary number.