Yes I like the idea but I think a Level 1 is already on the pump (it would be annoying to train one on every pump) so maybe level 2 and above is better with a toggleable option so if it is off it will be just x fire officers not x L2 x L3 x L4
Edit: i see what you mean sorry
Commanders run in fire officer cars
Level 2 (like a intermediate commander would be seen on fires like the house fire (person reported) or mutiple garges on fire)
Level 3 ( you will see them arrive when there is a larger fire with maybe 3-4 total officers along side the level 2s)
level 4 ( you see them on Major Incidents where you have all kinds of officers form L2- Hazerdous advisor- Tac Aid - )