If you’re willing to skip a select few “blacklisted” missions that don’t come up often RNG-wise, we’ve developed a Caracal Navy Issue fit that will outperform the Gila (in most missions in L3s specifically)- and is cheaper to boot - since it kills enemy drones, frigates, destroyers, and cruisers much more quickly (and without waiting for drones to slowly zip back and forth between rats, or having their damage dissipate when the enemy outpaces them).
One interesting point of comparison: the Gila is only bonused for medium drones, which, in the absence of webs and paints, aren’t as effective as the light drones used by the CNI against frigs/dessys, and their damage is comparable to lights against cruisers due to how precision mechanics work. The real muscle of the CNI, however, comes from its missiles having high precision (so potential damage translates closely to actual damage), high rate of fire, and high impact (by contrast, Gila missile performance is pretty mediocre - and damage locked, a problem the CNI does not have). So whereas the Gila reigns supreme in higher end solo PVE content that the CNI is incapable of handling well (or at all), the CNI has the edge in the vast majority of L3 missions.
The missions you’d skip with the CNI are those with an unusually high number of battlecruisers compared to most L3 missions; since the CNI is designed to quickly dispatch drones, frigs, dessys, and cruisers specifically (which comprise almost the vast majority of rats in L3 missions), it’s not ideal for killing battlecruisers, and killing too many of them is rather slow. If you’re willing to skip these missions (they don’t come up often), then you’re going to have better throughput with the CNI over the Gila.
@Anderson_Geten 's Mach recommendation is fairly clever. My biggest concern with the recommendation would be the cost and mobility of the ship. I haven’t had time to examine all of options for the best possible ship to use if someone were to take on all L3 missions (mostly because your overall throughput would be less than if you were selective - part of blitzing is knowing which missions to skip)… there’s a lot of damage modeling involved when concluding which ship is better than another (numbers matter, opinions do not).