Well, that seems easy enough to test, so I did. Made a new MM, took 'em to the tutorial. After getting to level 2, here were the results.
* Level 2 Punk (unenhanced) vs. Level 1 Neo-Shivan: Punk shoots Shivan with their Pistol for 12.85 points of lethal damage!
* Level 2 Punk with Clockwork Efficiency slotted immediately vs. Level 1 Neo-Shivan: Punk shoots Shivan with their Pistol for 12.85 points of lethal damage!
* Level 2 Punk with Clockwork Efficiency slotted and then resummoned vs. Level 1 Neo-Shivan: Punk shoots Shivan with their Pistol for 14.57 points of lethal damage!
* Level 2 Punk with Clockwork Efficiency trashed immediately vs. Level 1 Neo-Shivan: Punk shoots Shivan with their Pistol for 14.57 points of lethal damage!
So yeah, it seems the GM was correct and enhancements apply on the pets at the time they're summoned. If slotting changes after they're out, they just need to be dismissed and called again and all will be well. And I can make this experimental character more permanent, along with a few other Mastermind plans.
Incidentally, how's Thugs/Traps?
Thumbs up for testing!!!’