I've for sure missed a lot this past week due to finals/work, but I've finally read through this thread and I've got some thoughts of my own. Love the discussion so far.
I want to chime in and talk about sets that have already been proposed, rather than propose any of my own. I like pretty much every set following the STAB/STAB/Support/Support formula, so I won't comment on those. I'll mainly comment on sets that are more niche.
Name: 27 go boom
Move 1: Explosion
Move 2: Flare Blitz / Fire Lash
Move 3: Dragon Claw
Move 4: Will-o-Wisp / Thunderwave
Ability: Regenerator
Item: Heavy Duty Boots
EVs: 252 Atk / 4 Def / 252 Spe
Nature: Jolly
I like Explosion on this. A good way to do a lot of damage and grab momentum, at the cost of losing 27. I like the synergy with Fire Lash, too. Definitely something I'll have to play with.
Name: Specially Offensive Lure
Move 1: Draco Meteor
Move 2: Fire Blast
Move 3: Dragon Pulse / Flamethrower
Move 4: Taunt / Encore
Ability: Regenerator
Item: Life Orb
EVs: 252 SpA / 4 SpD / 252 Spe
Nature: Timid
Flamethrower and Dragon Pulse are too weak, especially coming off of 92 base special attack, to even be used, as this think kinda relies on the high base power of Draco Meteor and Fire Blast to even work correctly. I think realistically the way this set plays out is it'll ideally lure the physically defensive threats you want it to, and then do a large chunk to them. While you
can 2HKO them, they're likely not going to let you, so they'll switch out, giving you another turn to click a different move. Especially since the special lure only works once a match if at all, you'll need the support moves in your moveslots to continue being useful after the fact, and if your only support move is taunt or encore, that limits what 27 can do even more. This set really wants a status it can spread. And although life orb recoil sucks, especially on a move coming from an uninvested stat, knock off is still a good way to be useful after you've revealed being special. Taunt is still really good to use against the Clefables that'll end up switching in after you've revealed being special, though. I think a set like this would function a lot better:
-Draco Meteor
-Fire Blast
-Will-o-Wisp / Thunder Wave
-Taunt / Knock Off / Healing Wish / Aromatherapy
Name: Mixed Attacker
Move 1: Flare Blitz
Move 2: Draco Meteor
Move 3: Will-O-Wisp / Healing Wish
Move 4: Taunt
Ability: Regenerator
Item: Life Orb
EVs: 12 Atk / 240 SpA / 4 SpD / 252 Spe
Nature: Timid / Hasty
My biggest issue with this set is that I think EVing for a Life Orb Flare Blitz 2HKO on clef is a wasted endeavor. LO + Flare Blitz recoil just seems like a very bad idea on a mon whose defenses are barely enough to avoid the moonblast 2HKO
without any recoil. It's made for a mon who you won't switch into, and a mon that won't switch into 27.
Name: AV Green Mage (Special Status Inducer)
Move 1: Knock Off
Move 2: Fire Blast
Move 3: Draco Meteor
Move 4: Lava Plume / Dragon Breath / Nuzzle
Ability: Regenerator
Item: Assault Vest
EVs: 72 HP / 96 SpA / 88 SpD / 252 Spe
Nature: Timid
Interesting set for sure. I'd definitely wanna see some calcs/see it in play tho. With hazards on the field I see HDB being much better, but if you keep them off the field then I can definitely see the special bulk boost helping. Really curious about the damage output though. I have no issue with nuzzle, and if AV sets see any use I'd like seeing them use nuzzle rather than not.
Name: Choice Band
Move 1: Fire Lash / Heat Crash / Flare Blitz
Move 2: Dragon Claw / Outrage
Move 3: Knock Off
Move 4: Trick
Ability: Regenerator
Item: Choice Band
EVs: 4 HP / 252 Atk / 252 Spe
Nature: Jolly
I'm a big fan of a choice band on 27. Definitely more on the offensive side but I think with trick and the extra damage you can get with it against mons that might otherwise be fine taking hits from 27 makes it fine for our concept. And although Darmanitan has a significantly better damage output, 27 has the benefit of a better speed tier. I really love the idea of tricking a choice band to toxapex >:).
Name: Scarf User
Move 1: Flare Blitz
Move 2: Dragon Claw
Move 3: Knock Off/ Coverage
Move 4: Switcheroo/ Healing Wish
Ability: Regenerator
Item: Choice Scarf
EVs: 4HP / 252 Atk / 252 Speed
Nature: Jolly
Name: **Trickster Cleric**
Move 1: Flare Blitz / Fire Lash
Move 2: Dragon Claw / Dragon Rush
Move 3: Healing Wish / Aromatherapy
Move 4: Trick / Switcheroo
Ability: Regenerator
Item: Choice Scarf
EVs: 32 HP / 252 Atk / 224 Speed
Nature: Jolly
In the same vein as a Choice Band, I'm also not against a Choice Scarf set. Trick/Switcheroo, and being able to outspeed mons it otherwise wouldn't are cool for the concept imo. However a key mon a choice scarf lets you outspeed is not OHKO'd by dragon claw with a jolly nature:
252 Atk Charizard-Mega-X Dragon Claw vs. 0 HP / 0 Def Dragapult: 290-344 (91.4 - 108.5%) -- 50% chance to OHKO
An adamant nature does get it though:
252+ Atk Charizard-Mega-X Dragon Claw vs. 0 HP / 0 Def Dragapult: 320-380 (100.9 - 119.8%) -- guaranteed OHKO
As does a neutral nature uninvested Draco Meteor:
0 SpA Charizard-Mega-X Draco Meteor vs. 0 HP / 4 SpD Dragapult: 330-390 (104.1 - 123%) -- guaranteed OHKO
I think these sets could use some workshopping. Could be as simple as changing the nature to adamant, or it could be playing with the speed tiers and allocating extra EVs elsewhere.
Name: Disable Tech
Move 1: Fire Lash / Flare Blitz
Move 2: Dragon Claw
Move 3: Disable
Move 4: Substitute / Encore
Ability: Regenerator
Item: Leftovers / Heavy Duty Boots
EVs: 252 Atk / 4 SpD / 252 Spe
Nature: Jolly
Encore+Disable is definitely a funny combo, and I don't really see it being oppressive like Block/Imprison/Transform Mew. I think 27 wants a way to take advantage of the switches it'll force, and this set doesn't really give it that (but maybe that's a good thing in regard to team support). You can still switch out when you expect the opponent to though (or click sub if you don't have one up already). I think this set is a cool way to allow 27 to sit in on a few mons that would usually win 1v1 like mollux, and for that reason I like it.
Name: Non Snael Webs Lead
Move 1: Sticky Web
Move 2: Taunt
Move 3: Fire Lash
Move 4: Dragon Claw / Memento
Ability: Regenerator
Item: Focus Sash
EVs: 252 Atk / 4 Def / 252 Spe
Nature: Jolly
Haven't seen any discussion on Sticky Web beyond this, and I do think like other hazard options this would dominate moveslots, but I also think by nature of being a more unique hazard with low distribution, webs are more interesting. I think exploring them with a suicide lead isn't the way to go, as that's what most sticky webs users do (suicide lead sets will still appear if it gets webs for sure though). I think by nature of being a regen mon it might be better to look at it as a mon that can set them up repeatedly vs teams with good hazard removal. I'm very cautious of webs, but also interested.
Name: Ability Remover/Debuffer
Move 1: Fire Lash
Move 2: Dragon Claw / Knock Off
Move 3: Simple Beam
Move 4: Screech / Noble Roar
Ability: Regenerator
Item: Life Orb / Heavy Duty Boots /
EVs: 252 Att / 4 Def / 252 Spe
Nature: Jolly
This is something I'd definitely need to see in play to believe works. Simple Beam vs mons like Toxapex could be good to remove regen when it switches out, but 27 isn't going to do much damage to pex anyway that losing regen won't be
that big of a deal. I also don't see how simple beam->fire lash is any better than fire lash->fire lash. And the thing with Simple Beam and debuffing stats is that the opponent can easily just switch out. And I think you definitely want hazards up and a good way to take advantage of the switches to make this set work.
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Do we think CAP27 should get access to Paralyzing Moves?
The whole process I've wanted for it to get access to thunder wave tbh. I don't really see it being oppressive, or outright better than WoW/other support moves either, but with a high speed tier/good offensive presence/regenerator I can see the potential for it to be out of hand. So having not done the testing I won't outright say yes.
I haven't seen any mention of Dragon Tail/Phazing in general thus far, and that's probably due to 27's high speed tier and lower bulk. But 27 isn't frail and I think especially if 27 is forcing switches like it's supposed to using Dragon Tail could be really good with hazards up, getting chip damage on 2 mons in the same turn. Definitely something I'll have to play with.
I briefly want to talk about Wish, seeing as it was allowed for discussion again. I've been of the opinion mainly that it wouldn't be broken or overpowered on 27, but that it encourages a more passive style of play, which isn't in line with my idea of "offensive support." It's something I want to test more for sure cause I would love to see Wish on a mon like 27 that embodies good two move coverage and has Regenerator to help it. I've only gotten to do one test battle with it so far, and my Wish 27 mainly only clicked wish and immediately switched out, so I'm still of the opinion that it encourages playing too passive for me to consider it offensive support. That's really all I feel I can say on it at the moment.
More opinions likely to come as I get some opportunities to test.