harlandski says:
Great - can I retroactively add effort to that attack to do damage, or do I have to declare that I'm doing that before I attack? If I can, I will!
Also is that Vocal Changer cypher still in operation, and can I use it for other voices, or only for broken hounds?
The Vocal Changer wont do any effect, that tells to Mandoric his common sence. They are guardians which have only purpose - to guard in all costs. They are constructs, and contructs normally emotionless, self-less and dedicated to the task they were created for.
No, sorry, but the rule do not allow that. Now when Mandoric realized that his precise hits wont do much effect, he could adjust his combat tacticts. But not before he actually tested it, and not without guessing that prior to fight start.