Please stop repeating nonsense. Arties are worse for L4 missions compared to basically any other weapon system. No one should use an Arty-Vargur for running missions. ACs beat Arties by a mile.
Even a goddamn Cruise Missile Golem (which also sucks badly and is probably one of the worst Marauders you can fly in L4 missions) will probalby beat an Arty Vargur by quite a margin.