I think a change I would make is to put dartiling in high B tier, the +1 pierce literally doubles how good the 0-0 dartling is, a useful strat is to just spam 1-0 dartlings and they shred moabs

Good list, for most part i agree, but few stand out to me where i would have them higher or lower or sure. The last upgrade for Dart is not simply lead poping power, the explosion actualy does dmg and can pop bloons. It makes huge difference, where you can win most maps just spamming 2/3 dart monkeys if you have dart specialty. Free dart is also one of best tier upgrades imo, for super hard maps where u need dmg in a lot of places early or easier maps to get economy going earlier. On other hand i think you haven't used bucc upgrade in btd5 for a while, but it doesn't set anything on fire, that's only in btd6, this one just gives ice/lead popping power. Camo aura sound good but, both water monkeys can already get camo upgrades. And if u gona be using bucc to give camo to land units, 0/2 village is much better option, it's more expensive but u will save money over all because of discount buff, and later other village buffs. This just makes bucc a worse dart monkey, where it can do everything early game, but the special building gives it no scaling power for later rounds, unlike darts extra economy/power bonus. The bomb range buff, it's fair enough if u don't like using it, but it's one of strongest buffs in game, almost as good as boomer double throw, would be equal if it was passive and not ability. Maulers can hit whole map and they never miss moabs. Bloon impacts you can put on oposite ends of track and still cover full track on both, so they will always hit something, but this is mostly op for maulers. 10 x 2/3 maulers cost less then 4 x 4/2 chipers and can take care of all moab/bfbs, but also have really high poppin power for normal bloons. Only annoying thing is obviously ability spam.

I agree with everything you said, but early game help can be exponentially powerful when you include farms in the equation.

Spactory definitely deserves to be higher. To start, spike factories themselves are quite expensive to begin with, so the discount is pretty noticeable. It also buffs the power of spike factories to the point where you can start a normal game off just placing one of them, which costs about the same as the infamous 1-0 super sentry engineer, and it handles a surprisingly big amount of rounds all by itself when unupgraded. I'm usually able to go right into farming after placing it. Although I don't have the most experience with mastery mode, I feel like it definitely has a strong presence. From what I can tell, the free road spikes you get each round are buffed by 50% as well just like regular spikes, which lets you literally skip the first few rounds by using spikes alone. This could help with getting farms earlier than usual or starting with a more expensive tower/upgrade. The free spikes in general also come in very clutch in the mid-game if you let them rack up.

Good video kinda wish they would add buildings for farm and village