Alright, I have thoroughly tested everything, here are my proposed changes:
(generally, Red = bad/remove, Green = good/keep/add, blue = change/modify).
Blastoise:
Literally remove EVERY set expect for the Utility set and, surprisingly, the Choice Specs set:
Utility: Blastoise is one of the best Spinners in the tier simply because of its awesome typing and Yawn. Yawn makes it able to force the spinners to switch, and with simple Stealth Rock support, something like Froslass will not survive long doing that, albeit it has Pain Split, but it won't be setting up Spikes either.
Zzz: This set is just a) set up bait, and b) outclassed by Milotic times 100. Rapid Spin is not even remotely a viable option since you aren't going to even threaten any Ghost at all. Roar is alright, but that's all it does, and it's really not anywhere near the quality that the utility set is.
Choice Specs: This set was surprisingly decent. I mean, unlike the Choice Band set, I surprised and OHKOed so many Ghost-types that I actually enjoyed testing the set simply for the "lol" factor of using Specs Blastoise. With a Timid nature, Blastoise outpaces Pokemon like Modest Moltres and Jolly Absol at a nice number of 280. With Modest, it's still faster than some Pokemon, but I like outpacing Venusaur and 2HKOing it with Ice Beam. Water Spout is a necessity on this set, it 2HKOes offensive Venusaur, and if comes in early in the game it is definitely quite difficult to take out. It works kind of like Typhlosion but with better defensive typing, not weak to Stealth Rock, better defenses, and more surprise factor. I propose making the set resemble this:
[SET]
name: Choice Specs
move 1: Water Spout / Hydro Pump
move 2: Ice Beam
move 3: Hidden Power Grass
move 4: Surf / Rapid Spin
item: Choice Specs
nature: Timid
evs: 252 SpA / 4 Def / 252 Spe
Either way, Rapid Spin and Water Spout make it different than Specs Milotic, so as long as that is emphasized I say the set should stay.
Choice Band: Do I need to explain how this is bad/outclassed by Azumarill. I literally had trouble taking out a Pokemon in any match even when I took them by surprise, unlike the Specs set. Like, it does approximately uhhh 70% to min/min Rotom? Yea good luck surviving that Thunderbolt with no SpD EVs, and now the surprise is over.
Choice Scarf: This set was very frustrating to test because I did have high expectations after using the specs set. However, I tested basically EVERY type of Scarf set (including the one mentioned in the current revamp) with every nature, and it still was very very lackluster. The main point was: I rarely got to use full power water spout, and when I did get to use it, the Specs set would have simply done it better. With a Modest nature, Blastoise is too damn slow to be an effective Water-type Choice Scarfer. It's slower than RP Perior, Aggron, and Torterra. It's slower than goddamn unboosted Swellow! With Timid, not only is Blastoise too weak (i.e. it doesn't even 2HKO most offensive Venusaur), but it also is still too slow. It misses out on the crucial 3 Speed points to outpace Adamant Rock Polish Torterra, among other things. Without Water Spout - actually, even with Water Spout - this set is 100% outclassed by Milotic if you have to Scarf a Water-type. I have some logs if necessary.
Torterra:
Since I did this revamp myself like a day ago, I tested every set on there and here is what I found:
Rock Polish: I'm sure everyone (especially SDS - who used to abuse this in UU himself) can attest to how good this thing is. It destroys most offensive teams because of its bulk and impeccable type-coverage.
Tank: I mean, of course when you pair incredible defensive typing, great defense, a great support movepool, and a recovery move, you're going to get a great defensive Pokemon. It makes a great Rhyperior check, as well as a surprisingly good Pokemon to take out bad Raikou's (who don't have +1 HP Ice).
SubSeed: I think I was most impressed with this set, because it simply demolished most of Torterra's would-be counters and then could actually sweep itself because of its naturally good attack and STAB Earthquake. It was great because for some reason people loved running Weezing to deal with Torterra, and consequently got demolished when they tried to WoW Torterra's Substitute.
Dual Screen: I was very skeptical of this set because I didn't get what it had on Uxie, but after a bit of testing I realized how important the resistances and STAB attack that Torterra has are. Without it, you get set up on by Pokemon like SubCM Raikou (we all know what happens when you let it set up). Torterra has an easy time switching into CB Rhyperior and Aggron when they spam Stone Edge / Head Smash and set up, while Uxie takes a shitload of damage. Not to mention, Torterra has much better defensive synergy with Pokemon like Houndoom and especially DD Gatr since it lures Ice-type attacks.
Rest + Sleep Talk Shuffler: Self explanatory. It is bulky enough to take hits and status while threatening with a strong STAB and Roar. I used LR's old stall team which used this Torterra, and even though I hate stall, it was clearly a strong Pokemon on the team.
Choice Band: Being able to switch in on every wall and a good chunk of offensive Pokemon a good Choice Band user. It doesn't exactly cause pure destruction like CB Rhyperior, but it is faster, has better typing, and easily deals with Pokemon like Milotic.
Subtitute + 3 Attacks: This is a fairly new set that I was eager to test out because I had heard great things, and they were all true! Torterra causes a large amount of switches, and is definitely effective at abusing its Substitute to take out basically any Pokemon on offense.
Swords Dance: It neither hits hard enough, nor is bulky or fast enough (or contrarily, slow enough for Trick Room). I had trouble setting up, and when I did, I was usually forced out. Torterra is better boosting its Speed, setting up a Sub, or straight up attacking than setting up a Swords Dance.
Lead: One word: Froslass. Until Froslass is officially gone, there is not a chance this will work. I literally lost every lead matchup when I tested the set.
Azumaril:
Choice Band: Quite obviously one of the most deadly sets of any Pokemon in the metagame.
Non-Choice: I really like this set (I can't remember who suggested to me) because it allows you to abuse everything that Azumarill excels at: it's bulk, 101 Subs, priority, and monstrous attack stat. I think this set should look like this:
[SET]
name: Non Choice
move 1: Double-Edge
move 2: Aqua Jet
move 3: Ice Punch
move 4: Substitute / Waterfall
item: Leftovers / Life Orb
nature: Adamant
evs: 252 HP / 252 Atk / 4 Spe
I know, no STAB as a main option, but consider this: Double-Edge and Waterfall have the same base power. Sure, Waterfall has the flinch and the lack of recoil, but the coverage that Normal brings to the table is absolutely worth sacrificing.
SubPuncher: I think Toxic and Ice Punch should be slashed in with Aqua Jet and Waterfall respectively. Toxic helps with Slowbro and Milotic, while Ice Punch helps with Venusaur.
Rest + Sleep Talk: Yea, it's good. It has the advantage of being able to status absorb that the other sets can't. It also has more longevity than the other sets.
Belly Drum: I set this up like, twice in my testing (I tested for approximately 10-20 matches depending on how skeptical of the sets I was....). One of those times, I was just outspeed and KOed by Raikou. It's too slow. You lose all of its bulk. There is really nothing good about this set.
Blaziken:
Mixed Priority Attacker: It's not as good as it used to be in this metagame (I tested both spreads, don't even), I felt it was kind of outshone by the physical Choice set this round at least. But it's still a great set, revenge killing with Vacuum Wave is always useful, and it's fun to catch an offensive team with Stealth Rock up, because they have no switch-ins.
Physical Choice (move this set to the top): I was thoroughly impressed by both Scarf and Banded variants of Blaziken because of how awesome physical fire-type attacks are in this metagame. Because Slowking and SpD Milotic have shown up everywhere, I literally 2HKO every Water-type that comes in with the Choice Band set. The Scarf set destroys offense one Pokemon at a time for the same reason actually.
Special Choice: Other options. It is purely outclassed by the mixed attacker. Moltres and Magmortar do this better. Focus Blast is cool, but it's too unreliable (use Superpower on the LO set instead ?????)
Mixed Agility: It's good, hard to set up, but it's still pretty good with minimal Stealth Rock support. Again, the special waters are a little frustrating, but at least this set has a higher Attack stat to nail them with Superpower (I know right). Because of the ease Spikes brings, and how people's lone Fire-type switch-ins are usually weak to Superpower or Stealth Rock, this thing can still sweep quite often.
Mixed Choice Scarf: Not as destructive as the physical choice for this metagame, but it is a very reliable revenge killer. It's hard to find something that actually sweeps that isn't easily stopped by this set because of it's impressive coverage.
Reversal:
1) Sandstorm is fairly common.
2) priority is impossible to remove, and is literally everywhere.
3) priority is impossible to remove, and is literally everywhere.
Swords Dance: This is a fairly new set, and it's pretty good at blowing holes in the opponents team for something like Swellow or even Raikou. Franky is currently doing this write up so.....yea lets get it on site.
EDIT: Mentioning the "Choice Scarf" set that's in the Blastoise revamp.