The artillery duel wasn't going well for the Golden Skull Alliance. No matter whether it was the Larkinson Clan, the Glory Seekers or the Cross Clan, neither of them possessed a strong enough artillery unit that could compete against the Ferril Provincial Army's Steel Rain mech regiment.
This was the difference between a band of space vagabonds and a professional mech military backed by an entire second-rate state!
The amount of support enjoyed by the latter was so disproportionately big that there was no true contest. It wasn't simply a matter of funding. The Larkinson Clan had plenty of money to spare and could invest in even higher-quality mechs if necessary.
The Steel Rain simply enjoyed too many other advantages. It was part of a large mech army that was not only professionally organized but contained a huge number of mech pilots and other skilled personnel.