The problem with this is the skyguard doesn't have even close to the same options as the liberator when it comes to dictating the terms of the engagement. IMO the skyguard should win the DPS race at close range if both start firing at the same time. It should require the tankbuster lib to get in close and open with rear-shots that the skyguard is unaware of. If the lib pops up over a hill and into close range with a skyguard who is aware and waiting for it, it should go very badly for the lib. Badly in the same way as MAX vs C4. Reason is simple: lib can pick its terms of engagement, skyguard cannot with the same impunity. The lib always has the option to depart. From a purely balance perspective: the liberator is a 3-man multi-role vehicle that can quickly relocate to find something else to do. A skyguard is a 1-man single-role vehicle that cannot. Specialisation should trump generalisation. One skyguard should be enough.