>>95873659
Luna Titanium isn't "impervious or near impervious to all forms of damage". It was able to shug off the Zaku II's 120mm Machine gun cannon but it would take damage from the 280mm Zaku Bazooka and later on in the OYW the beam rifles of the Gelgoog.
That also includes the heat hawks that the Zaku II's had so It is well within reason that an Axeman could win should the writer deem it