Communion questions

[thejeff]

There have been a bunch of threads about this. There's a communion guide floating around.

The short of it is:
A slave who acts before any master casts a spell will cast normally. Commanders act in the order on the army setup screen. So if your masters are at the bottom you can get the slaves to cast.

It's always been that way. It's apparently unintended. It's listed on the bug shortlist, but it seems to be commonly accepted.