The Pursuit targeting mode seems to not work well with Razor Rotors, which is on the same path as it, and seems to do better with Downdraft and MOAB Press. Do you think the upgrade paths it's on could be improved? I think that it could be swapped with IFR
No, don’t swap it. First, Persuit is on the “aggressive” path 1 and Razor Rotors also enhances the aggression of the Heli. Second it MOAB Press is a 0-0-4 Boomerang, and I am pretty sure you meant MOAB Shove.
I did mean MOAB Shove, but IFR would work well with the aggressive path as well. Also, IFR doesn't let other towers hit camo. When using something with Razor Rotors or higher, you hardly ever put it on Pursuit, so why make it necessary for it?
Razor Rotors still does at least some damage to the front-most bloons. It still will pop leads somewhat reliably on Pursuit, though I agree it's not very reliable. However, I must agree with Ezw with the point that "Pursuit is on the 'aggressive' path 1 and Razor Rotors also enhances the aggression of the Heli".
Out of interest, Razor Rotors on Pursuit in BTD5 and Bloons TD Battles Mobile is such a pain and is even more unreliable than in BTD6.