I have recently made a section in my userpage about rating each tower and its upgrades in BTD6. In my blog, I review each of the towers and their upgrades, including the base tower. I will apply a rating based on what I consider on firstly the base towers, then their upgrades, and then the tower overall.
= Good
= Meh
= Bad
(no rating) = Hasn't been reviewed yet
| Base Tower | Tier-1 | Tier-2 | Tier-3 | Tier-4 | Tier-5 | Overall |
|---|---|---|---|---|---|---|
 Dart Monkey $200 (Medium)
|
Sharp Shots $140 (Medium)
|
Razor Sharp Shots $220 (Medium)
|
Spike-O-Pult $300 (Medium)
|
Juggernaut $1800 (Medium)
|
Ultra-Juggernaut $15000 (Medium)
|
|
| Quick Shots $100 (Medium)
|
Very Quick Shots $190 (Medium)
|
Triple Darts $400 (Medium)
|
Super Monkey Fan Club $8000 (Medium)
|
Plasma Monkey Fan Club $50,000 (Medium)
| ||
| Long Range Darts $90 (Medium)
|
Enhanced Eyesight $200 (Medium)
|
Crossbow $625 (Medium)
|
Sharp Shooter $2000 (Medium)
|
Crossbow Master $27,000 (Medium)
| ||
 Boomerang Thrower $325 (Medium)
|
Improved Rangs $200 (Medium)
|
Glaives $280 (Medium)
|
Glaive Ricochet $1300 (Medium)
|
M.O.A.R Glaives $3000 (Medium) |
Glaive Lord $40,000 (Medium) |
|
| Faster Throwing $175 (Medium)
|
Faster Rangs $120 (Medium)
|
Bionic Boomerang $1600 (Medium)
|
Turbo Charge $4000 (Medium) |
Perma Charge $35,000 (Medium) | ||
| Long Range Rangs $100 (Medium)
|
Red Hot Rangs $150 (Medium)
|
Kylie Boomerang $1400 (Medium)
|
MOAB Press $1800 (Medium)
|
MOAB Domination $50,000 (Medium) | ||
 Bomb Shooter $600 (Medium)
|
Bigger Bombs $400 (Medium)
|
Heavy Bombs $800 (Medium)
|
Really Big Bombs $1500 (Medium)
|
Bloon Impact $3200 (Medium)
|
Bloon Crush $55,000 (Medium) |
|
| Faster Reload $200 (Medium)
|
Missile Launcher $400 (Medium)
|
MOAB Mauler $900 (Medium)
|
MOAB Assassin $3200 (Medium) |
MOAB Eliminator $35,000 (Medium) | ||
| Longer Range $200 (Medium)
|
Frag Bombs $300 (Medium)
|
Cluster Bombs $800 (Medium) |
Reclusive Cluster $2400 (Medium) |
Bomb Blitz $35,000 (Medium)
| ||
 Tack Shooter $280 (Medium)
|
Faster Shooting $150 (Medium)
|
Even Faster Shooting $300 (Medium)
|
Hot Shots $600 (Medium)
|
Ring of Fire $4500 (Medium)
|
Inferno Ring $50,000 (Medium) |
Tack Shooter
|
| Long Range Tacks $100 (Medium)
|
Super Range Tacks $225 (Medium)
|
Blade Shooter $550 (Medium)
|
Blade Maelstrom $2700 (Medium)
|
Super Maelstrom $15,000 (Medium) | ||
| More Tacks $100 (Medium)
|
Even More Tacks $100 (Medium)
|
Tack Sprayer $450 (Medium)
|
Overdrive $2500 (Medium)
|
The Tack Zone $20,000 (Medium)
| ||
| File:Tba.png tba $tba (Medium)
|
TBA | TBA | TBA | TBA | TBA | File:Tba.png |
| TBA | TBA | TBA | TBA | TBA | ||
| TBA | TBA | TBA | TBA | TBA | ||
 Wizard Monkey $550 (Medium)
|
Guided Magic $175 (Medium)
|
Arcane Blast $600 (Medium)
|
Arcane Mastery $1300 (Medium)
|
Arcane Spike $10,000 (Medium)
|
Archmage $32,000 (Medium)
|
|
| Fireball $300 (Medium)
|
Wall of Fire $1100 (Medium)
|
Dragon's Breath $3600 (Medium) |
Summon Phoenix $5,000 (Medium) |
Wizard Lord Phoenix $80,000 (Medium) | ||
| Intense Magic $300 (Medium)
|
Monkey Sense $300 (Medium)
|
Shimmer $1800 (Medium)
|
Necromancer: Unpopped Army $300 (Medium)
|
Prince of Darkness $24,000 (Medium)
| ||
 Super Monkey $2500 (Medium)
|
Laser Blasts $2700 (Medium)
|
Plasma Blasts $5000 (Medium)
|
Sun Avatar $21,000 (Medium)
|
Sun Temple $100,000 (Medium) |
True Sun God $500,000 (Medium) |
Super Monkey
|
| Super Range $1000 (Medium)
|
Epic Range $1400 (Medium)
|
Robo Monkey $9000 (Medium)
|
Technological Terror $22,000 (Medium) |
The Anti-Bloon $90,000 (Medium) | ||
| Knockback $3000 (Medium)
|
Ultravision $1200 (Medium)
|
Dark Knight $5500 (Medium)
|
Dark Champion $60,000 (Medium)
|
Legend of the Night $200,000 (Medium) | ||
 Ninja Monkey $500 (Medium)
|
Ninja Discipline $300 (Medium)
|
Sharp Shurikens $350 (Medium)
|
Double Shot $850 (Medium)
|
Bloonjitsu $2750 (Medium)
|
Grandmaster Ninja $35,000 (Medium)
|
Ninja Monkey
|
| Distraction $350 (Medium)
|
Counter-Espionage $500 (Medium)
|
Shinobi Tactics $900 (Medium)
|
Bloon Sabotage $5000 (Medium)
|
Grand Saboteur $22,000 (Medium)
| ||
| Seeking Shuriken $250 (Medium)
|
Caltrops $400 (Medium)
|
Flash Bomb $2750 (Medium)
|
Sticky Bomb $4500 (Medium)
|
Master Bomber $60,000 (Medium)
| ||
 Alchemist $550 (Medium)
|
Larger Potions $250 (Medium)
|
Acidic Mixture Dip $1250 (Medium)
|
Berserker Brew $850 (Medium)
|
Stronger Stimulant $2500 (Medium)
|
Permanent Brew $80,000 (Medium) |
Alchemist
|
| Stronger Acid $250 (Medium)
|
Perishing Potions $475 (Medium)
|
Unstable Concoction $3000 (Medium)
|
Transforming Tonic $5000 (Medium) |
Total Transformation $50,000 (Medium) | ||
| Acid Pool $600 (Medium)
|
Faster Throwing $500 (Medium)
|
Lead to Gold $1000 (Medium)
|
Rubber to Gold $2750 (Medium)
|
Bloon Master Alchemist $40,000 (Medium)
| ||
 Druid $425 (Medium)
|
Hard Thorns $250 (Medium)
|
Heart of Thunder $1000 (Medium)
|
Druid of the Storm $2000 (Medium)
|
Ball Lightning $6000 (Medium) |
Superstorm $90,000 (Medium) |
Druid
|
| Thorn Swarm $250 (Medium)
|
Heart of Oak $350 (Medium)
|
Druid of the Jungle $950 (Medium) |
Jungle's Bounty $5000 (Medium) |
Spirit of the Forest $50,000 (Medium) | ||
| Druidic Reach $100 (Medium)
|
Heart of Vengeance $300 (Medium)
|
Druid of Wrath $600 (Medium)
|
Poplust $2500 (Medium)
|
Avatar of Wrath $45,000 (Medium)
|
If you want to request a tower and/or upgrade to rate, please request in the comments. I encourage tower/upgrade suggestions from you all. I will be continuing improving this table as I play more of BTD6 and leveling up all the towers.
And here are some general comments regarding each tower:
General comment per tower[]
Dart Monkey[]
Solid tower overall, especially that extra pop buff compared to in earlier editions of the game. I generally enjoy this tower as an early-game tower, usually buffing their already useful power with Primary Training from the Monkey Village. Overall, the Path 2 and Path 3 upgrades are really nice to play with, especially 0/3/2 Triple Darts, 0/2/3 Crossbowers, and 0/2/4 Crossbowers.
When I review each of the three paths, Path 1 tends to be the least useful. Never do I use Spike-O-Pult unless I am getting Juggernaut, but nevertheless it's still useful, especially with a well-discounted price that is much more welcome for the poor pops and poor speed it typically had. I don't simply use the Juggernaut either, but when I do use it then it is quite a useful tower, especially spamming them for massive Ceramic Bloon crushing. The Ultra Juggernaut is also pretty good, but it only seems very useful among difficult Ceramic rounds such as Round 63, Round 76, or Round 78.
The Path 2 upgrades are no surprise very good, even if Triple Darts is now $400 instead of $330 in BTD5. There's no better value than this for early-game coverage. I leak very few lives when I place just a 0/3/2 Triple Darts in a Beginner map, so I can rake up mad income from Banana Farms. In Impoppable, despite potentially getting overgreedy with my income, I still love the reliable of these Triple Darts. Super Monkey Fan Club is pretty useful too, but does perhaps only does a bit of useful help. This is heavily overshadowed by the Plasma Monkey Fan Club, which I use when I feel like using Primary Training and their subsequent upgrades. And only then do I actually invest in Super Monkey Fan Clubs.
Path 3 upgrades are very nice, especially with good alternate path for Dart Monkeys. So if there's trouble with higher rank bloons, like Rainbows or Ceramics, 0/2/3 Crossbowers and 0/2/4 Sharp Shooters will help a bunch. They have a decent price for their power too, which is a plus. As for Crossbow Master, he is pretty useful, but I don't seem to foresee as much value as some players view it, especially when the Magic towers tend to appear superior in my view (particularly Ninja, Super Monkey, Druid, Wizard, Alchemist, in that order). However, with the Monkey Knowledge that allows multiple Crossbow Masters, I will keep a look out to more Crossbow Master defense, especially with that juicy speed and range.
Boomerang Thrower[]
I don't nearly use this guy as much as Dart Monkey, but I do use him a fair bit, particuarly when I use Primary Expertise. Again, I don't use Primary towers much unless I have Primary Training or am forced to play Primary Monkeys Only.
More stuff later...
Bomb Shooter[]
TBA
Tack Shooter[]
TBA
Ice Monkey[]
TBA
Glue Gunner[]
TBA
Sniper Monkey[]
TBA
Monkey Sub[]
TBA
Monkey Buccaneer[]
TBA
Monkey Ace[]
TBA
Heli Pilot[]
TBA
Wizard Monkey[]
TBA
Super Monkey[]
Compared to Bloons Monkey City, which I tend to prefer Dartlings due to Monkey Knowledge Packs buffs, I use the Super Monkey a lot in BTD6. Perhaps that is due to how good the upgrades are. This is particularly true with all Path 3 upgrades, with particular credit to Knockback and Ultravision. If it weren't for these two, then I'd probably not use Super Monkeys very much besides defeating the first early MOAB.
Path 1 is nice, but I don't really use the Sun Temple due to the camoless nerf and the sacrifices system nerf, as well as because Path 3 upgrades are much superior in my opinion. The Sun Avatar is great against popping Ceramics and below, as well as overall dispersal of sunbeams to damage huge amount of MOAB-class bloons significantly.
Path 2 is pretty interesting, because I initially used this path very often due to extended range, but then my friend reminded me that the Path 2 upgrades are not very worth the value, since range upgrades are easily obtainable through range-boosters such as Monkey Village or Berserker Brew/Stronger Stimulant. Nevertheless, I still enjoyed using the Path 2 upgrades, especially when added to the Sun Avatar, since the Sun Avatar already excels against Ceramics and lower.
Path 3 is probably the best path in my opinion now. Knockback is very handy against Ceramics and lower. Ultravision is a great upgrade for Camo detection, so they can be useful against pushing back all types of bloons Ceramics and lower. Knockback also pushes back a good number of MOABs too, which is also nice. With Dark Knight, this is makes the Super Monkey awesome, especially because I believe that this is the best combination for a third-tier Path 1 plus Path 3 Super Monkey, in which these two paths are the best paths of the Super Monkey. And plus, I can also upgrade it to Dark Champion for much awesomer MOAB-class popping power, especially against DDTs and Fortified DDTs if Plasma Blasts is also bought, since it still has automatic Camo detection.
Since I always only go to rounds up to around Round 100 (to up to Round 120), due to avoiding draining my battery on my less powerful iPhone SE, I think the Dark Champion is sufficient enough to fit the podium for my top strongest towers. And this automatic camo detection upgrade and the new interesting Knockback upgrade is what attracts me to like the Super Monkey a lot more.
Ninja Monkey[]
TBA