The problem isn't with the AI having monitors, the problem is the player driving a monitor and shoving it directly into the face of the nearest capital ship. Or ideally, multiple. Something has to give because a monitor should NOT be able to sit in a dorito's face and tank it indefinitely. Changing the AI does not change the fact that a dorito cannot kill a monitor. Changing the AI doesn't change the fact that the monitor has so much PPT that it can outlast nearly every ship in the battle and drain their CR to death at no danger to itself.
The point would precisely be changing the AI to ignore the Monitor as it is incapable to do pose any danger. At most you kit it out with dual Reapers and waste a Missile spec officer on it, even so it's a one-trick pony. Gutting a ship does not solve the AI's shortcomings in recognising threat.
Good job ignoring that A DORITO CANNOT KILL A MONITOR AND THAT IS THE PROBLEM.
With the Monitor being on its own, while fun, at max about 3 minutes of stalemate will end in a very dead Monitor.
If the issue is the Dorito focusing the Monitor (as it's the closest ship) while something else shoots it from afar without any retaliation, then see the part about the AI not being able to recognise (the lack of) threat being the problem.
Not being able to be killed
is the one thing the Monitor does. Just don't let it near a Harbringer.
I had considered replacing the default AI with a machine learning model, with officers getting smarter as they leveled up. However, the API doesn't appear to support this. The game is so complex that I'm skeptical anything other than machine learning will ever get it behaving intelligently.
If so that's a damn shame. I find the Monitor to have a quite interesting niche. It would be nice if it took more effort to use, as in actively get in the way of incoming fire instead of getting targeted due to simply being the closest to the enemy. I would think a modified avoid command should be sufficient on the AI's part to greatly diminish its use though.