Carrier-Airwing is a fun horizonatal autoscrolling shoot-'em-up; it holds a special place in my heart as it's the only game of its' kind I have one-credited. (On actual arcade hardware, no less.)
I think a good TAS would control both players; I've been doing some one-player play of it recently, and have been having trouble 100-killing the first few stages, which was never a problem for me on hardware. Additionally, two players adds more enemies, though I don't know just how much. Lastly in favor of a two-player run, there are some segments of Stage 2 where a single fighter is incapable of killing everything because of physical barriers.
Each stage has a different model of special weapon you can purchase, and the power also varies depending on what fighter you pick. The F/A 18 Hornet is balanced between the power of air-to-air and air-to-ground specials, while the F-14 Tomcat gets more powerful air-to-air specials, and the A-6 Intruder gets more powerful air-to-ground weapons. Paradoxically, the A-6 also gets a more powerful version of the final stage's special weapon, the Super Shell, than the F-14, despite it being an air-to-air weapon.
I don't recall if both players can pick the same fighter; I've never co-op'd the game that I can remember.
Is there a multitracking Lua script for FinalBurnAlpha, or does it support multitracking natively? If so, I'll give this a go with two players as soon as a version with speed throttling re-enabled is out.
Here is a longplay I found on Youtube. I haven't watched it yet, but the length seems unusual; I remember not taking more than about half an hour to reach the final stage on hardware, even considering I would typically fully dismantle every multi-component boss.