fatswimdudeexylatedemo have the least useful unlocks between 6s classes
demo has the fewest situationally viable unlocks but the most permanently viable unlocks (booties, pain train, iron bomber, old loose cannon rip). this is compared to pistol vs winger on scout and shotgun vs gunboats on pocket
you shouldn't even consider the iron bomber as an unlock and the pain train is a multiclass unlock loose canon is useless now so beside the booties there is no unlock worth using atm