Accuracy isn't a problem. Having more accuracy would be nice, sure, but it's not a problem that needs fixing.
Our problem is range.
The HA1, our best weapon, fires to BLOS+1 with Blastshell+R. But ultimately, it only fires at Extreme range with the Moskurg wind debuff. Worse yet, this range is where it hits the ground. Disregarding angling, a HA1 can only shoot at a Moskurger airship if it is at Long range.
Moskurg's Ballista can reach Extreme range when placed on ground. When on an airship, a Moskurger ballistae can fire up to BLOS range when we can only fire at airships at Long range. Most of their ballistae are on Skyhawks at this point.
So, to sum it up.
Moskurg can shoot us from their airships at BLOS range.
We can shoot at their airships when they're at Long range. Their airships are never at long range.
Moskurg severely outranges us due to the range debuff and their aerial superiority.
Because of this, Moskurg is doing to us what we did to Moskurg back when we got the HA1 working. They're beating us in artillery because of their aerial superiority. Accuracy isn't a problem. Range and aerial superiority are the problems. If we can shoot down their Skyhawks using the Lightning, then the problem is solved. If we outrange them again (or at least match them in range), then the problem is solved. If we can undo the debuff then accuracy would be a bit more relevant, but still not a huge issue.