HARPY seems like it is in an acceptable place. It fills the role of an early-game "bully" that picks on stragglers and assists allies in scuffles. It's not sturdy enough to survive midgame AA but it can be reused as a a defensive support unit. It has some strange relationships with other units, like being effective in A2A dogfights against Swifts and even occasionally Raptors. It is on a tighter clock to get value than most air units generally are, as VERY modest AA is quite threatening to it.
LOCUST is somewhat weak/situational, and it should remain that way so that Gunship plops do not become overly oppressive on certain maps. That said, I think players who can devote attention to it while raiding and scouting with it should be better rewarded for doing so than they are now. In team games, the biggest risk with making a Locust as a Scout/Raider as early as possible is its vulnerability to Swifts, especially deep in enemy territory. Its ideal targets seem to be Wind Generators and Mexes.
NIMBUS is also somewhat weak/situational, especially in the sense that it compares poorly to Revenant. Revenant is also an inaccurate high damage unit that prefers a lot of the same targets, but in exchange for lower range, Revenant has much better speed, health, burst damage, and AoE potential that make it more reliable at pushing through AA and finding value than Nimbus. Like Locust, it's probably for the best that Nimbus, in its current role, remains situational and easily countered for the health of the game. It struggles against mobile AA more than Revenant because it's unlikely to ever hit mobile units, but just like Revenant, "Mass Nimbus" can punish some poorly-supported static AA configurations.
---Suggestions ---
Harpy: 1200 Health -> 1250 Health
Harpy: Adjust its Attack-Move behavior, such that it "follows" units more effectively, and turns from its targets less.
Harpy is a very juicy target for the recently-buffed Tarantula, as it's now killed in 4 shots instead of 5. Several Harpies can spend limited time inside of AA if it helps to accomplish a task, but that risk isn't worth taking against Tarantula. A small health buff may help it in this regard without breaking Quant's Rule, as it's not particularly defined by "fragility." It's worth noting this is also a large buff vs Angler.
Harpy ALSO has an issue with following its targets, where it turns away before getting into firing range, repeatedly. Even when Harpy (on A-Move) is retreating from ITS targets, it has a strange propensity to turn away and then back toward the target, moving inefficiently. According to CharmedMage, it may have something to do with its "SkirmLeeway" value or some similar value, but I'm not sure.
Locust: Firing Arc 150 -> 180
Locust: Vision 500 -> 560
These are suggestions to slightly improve Locust's tactical autonomy as a scout and a raider. A greater firing arc would allow it to deal slightly more damage when repeatedly engaging and disengaging vulnerable targets like Wind Generators and Mexes. More vision range would allow it to less often "run face-first" into unexpected threats.
Nimbus: Vision 660 -> 760 (or even 800?)
This is a significant buff... Many potential adjustments to Nimbus threaten to bend Quant's Rule, as many of its flaws seem to be necessary forms of awkwardness expected in "Artillery" units, which Nimbus essentially functions as. A vision buff, however, may mesh well with the unit's identity and give it a rare form of supportive value. This is a relatively large buff to creating 1 or 2 Nimbuses, without giving much extra value to "Mass Nimbus." This buff would allow a Nimbus to fire at great ranges via its own vision, especially when it's on a high elevation; of course, the greater the range, the greater Nimbus's inaccuracy and the worse the impact of its slow projectile speed.
