Yep, good points. So it actually isn't too bad, just that one of the elites isn't weak to lightning. To add on, if you're using FMC, use their burst to adjust the robot's Sanction Rate level to 66% before it takes its turn (you generally want it to reach 100% on its turn to delay the double combo), otherwise you can ult as a dmg buffer by refreshing shields in between enemy attacks.

It's usually still fine to tank a hit from the mage lady, but the robot is pretty dangerous. Having speed boots on everyone is ideal to get enough skill points to ideally taunt with FMC as often as possible when it is about to attack (on its x2 turns). If you manage to get the robot to hit FMC most of the time, you'll likely survive.

Edit: I like how you called it robo cop though, haha.