Mayhem/Safeguard Mission Signature Foes

[DeviousMe]

After much investigation and trials, I've noticed that the team size option in the notoriety settings (both in talking to a hero corps field trainer/fateweaver and the menu in the chat bar) don't seem to affect the chance of a signature opponent spawning in mayhem and safeguard missions. Any chance it'd be possible to change that? While it's of course always an option to just gather up a team of six or more, sometimes I feel like just causing mayhem with a friend or two, and I'd love it if someone from the Freedom Phalanx would take the time to try and foil us when the PPD is so nice and accommodating to bring out their fullest when we're set to x8.