Why do I feel like Jimmy needs to be there just so Fionn can keep designating him as an "assistant" to carry heavy objects around everywhere and other such grunt jobs while he works with Iordin?
Why would he need to do that? It'd be a great way for him to work on the strength augments in the mech suit. Maybe have Jimmy do some light grunt work while the parts for his new mech suit are machined/3D printed. Or better yet...
Fionn: "Jimmy, here's a tazer. If Hack comes in and tries to interfere with the machine shop or mainframe, USE IT."
Fionn: "I meant USE IT ON HACK!!!" Jimmy: "Medic..."