Well, it is relatively easy to freeze people in eternal suspension, but not so easy to kill them outright. The entire purpose of the dispersal ships is to prevent the loss of life while still creating as much physical destruction as possible.

True. Though the people from the Inquest are quick to hail anyone who can wrestle control of their planets from the guiding computers as "gods". Would that tempt mir, or is she more interested in destruction?

So systems like that are what would be the worst hit by Mir's attacks. Good.