Some opinions:
Deoxys-A: I don't think this is that broken. Or if it is, it's less broken than other things. Compare it to Hoopa-U, for example. Hoopa-U lets you acheive similar offensive stats, but much higher defensive stats in exchange for an average speed stat, which doesn't matter a whole lot IMO cause of the powerful priority in this meta. It seems a lot more versatile due to being able to run a specially bulky mon, letting you run a more balanced sort of team, or you can just slap the 130 special defense on something like Scarf Excadrill and call it a day. I got sort of off topic but the point I'm trying to make is that there's a lot of risk associated with Deoxys-A teams and I think that it isn't particularly broken.
Swellow: Once again, there's a lot of priority here, but other than that Swellow seems really good. I think it's the most broken out of the four pokemon sin(pi) mentioned. Since there's no blobs, that means there's no switch-ins besides AV bouffalant and Mr. Mime of course. This is why we need a Rock/Ghost type with good Special Defense. Not only that but physical Swellow seems decently viable too. Guts boosted Facades off of 180 base attack are no joke, and it also gets Quick Attack to join the priority game, and foil weakened Talonflame. Swellow definitely deserves its spot at the top of the chopping board.
Linoone: Bellyspeed is good, but I actually think Choice Band might be even better. Linoone still has the same unimpressive bulk, so setting up a Belly Drum is pretty tough, although if you do it can end games. Choice Band is a lot more risk-free and lets it revenge kill pretty much any offensive pokemon, and I'm not even exaggerating. It easily OHKOs stuff like Latios, basically forcing the opponent's hand every time. You got Shadow Claw to donk ghosts and Trick if they have Registeel or something.
Serperior: While it's good, I don't know how well it fares against offensive teams, what with all the priority and Talonflame. Even if it stomps stall, the point of the metagame is not to make all playstyles equally effective, or so I've been told.
Other potential suspects:
Talonflame: No shit.
Light Ball: Pikachu just destroys stall teams, it kind of seems to be a trend here. But it's also capable of functioning against offense if you use Extreme Speed, and it actually outdamages itemless Linoone with it. And being an Extreme Speed user of that level means that it simply invalidates plenty of offensive mons with mediocre physical bulk. It has a ton of obscure options, like Volt Tackle, Icicle Crash, Fake Out, Focus Punch, etc. but most of them are illegal with each other. It can even run a special set that is basically impossible to switch into. Here's some calcs so you get an idea of just how strong Pikachu is.
252+ Atk Light Ball Pikachu Extreme Speed vs. 0 HP / 0 Def Serperior: 255-301 (87.6 - 103.4%) -- 25% chance to OHKO
252+ Atk Light Ball Pikachu Extreme Speed vs. 248 HP / 0 Def Talonflame: 324-382 (90.2 - 106.4%) -- 43.8% chance to OHKO
252+ Atk Light Ball Pikachu Extreme Speed vs. 0 HP / 0 Def Excadrill: 185-218 (51.2 - 60.3%) -- guaranteed 2HKO
-1 252+ Atk Light Ball Pikachu Extreme Speed vs. 0 HP / 4 Def Landorus-T: 178-210 (55.7 - 65.8%) -- guaranteed 2HKO
252+ Atk Light Ball Pikachu Volt Tackle vs. 248 HP / 252+ Def Clefable: 483-568 (122.9 - 144.5%) -- guaranteed OHKO
252+ Atk Light Ball Pikachu Volt Tackle vs. 244 HP / 0 Def Dialga: 235-277 (58.4 - 68.9%) -- guaranteed 2HKO
This is all with 180 base Attack, but no other changed stats. As you can see it's capable of 2HKOing pretty much everything. That Extreme Speed is particularly scary though, as it can actually 2HKO switch-ins.
252+ SpA Light Ball Pikachu Grass Knot (120 BP) vs. 252 HP / 200 SpD Primal Groudon: 325-383 (80.4 - 94.8%) -- guaranteed 2HKO
252+ SpA Light Ball Pikachu Thunderbolt vs. 252 HP / 168 SpD Ferrothorn: 156-185 (44.3 - 52.5%) -- guaranteed 3HKO after Leftovers recovery
252+ SpA Light Ball Pikachu Thunderbolt vs. 0 HP / 0 SpD Mega Manectric: 248-292 (88.2 - 103.9%) -- 25% chance to OHKO
252+ SpA Light Ball Pikachu Thunderbolt vs. 232 HP / 4 SpD Mega Venusaur: 176-207 (49 - 57.6%) -- 96.1% chance to 2HKO
252+ SpA Light Ball Pikachu Hidden Power Ice vs. 252 HP / 112 SpD Hippowdon: 418-492 (99.5 - 117.1%) -- 93.8% chance to OHKO
252+ SpA Light Ball Pikachu Thunderbolt vs. 0 HP / 4 SpD Kyurem-W: 205-242 (52.4 - 61.8%) -- guaranteed 2HKO
252+ SpA Light Ball Pikachu Hidden Power Ice vs. 252 HP / 252+ SpD Arceus-Grass: 234-276 (52.7 - 62.1%) -- guaranteed 2HKO
252+ SpA Light Ball Pikachu Grass Knot (120 BP) vs. 252 HP / 252+ SpD Arceus-Electric: 233-275 (52.4 - 61.9%) -- guaranteed 2HKO
252+ SpA Light Ball Pikachu Thunderbolt vs. 252 HP / 252+ SpD Kyurem-W: 148-175 (32.5 - 38.5%) -- 4% chance to 3HKO after Leftovers recovery (i found a switch-in! until it reveals focus punch....)
Without Chansey, nothing can switch in (not that Chansey is a very safe switch-in anyways, it can be 2HKOd by Thunderbolt if it gets Knocked Off).
But is Pikachu really broken? It still dies to any attack. It's not very fast either. And it has no longevity if it uses a move with recoil. But it's versatile, stupidly powerful, and if it's played right it can be kept away from attacks as it picks off and breaks through things. Definitely needs to be looked at.
Deep Sea Tooth: Clamperl is another Pokemon with very few switch-ins, but it doesn't have priority. Since it relies on Shell Smash to sweep, that instantly makes it way less broken than Pikachu in my mind. But yeah, here's another thing that completely shits on stall teams.
252+ SpA Deep Sea Tooth Clamperl Ice Beam vs. 252 HP / 200 SpD Primal Groudon: 244-288 (60.3 - 71.2%) -- guaranteed 2HKO
252+ SpA Deep Sea Tooth Clamperl Surf vs. 172 HP / 0 SpD Primal Kyogre in Heavy Rain: 206-243 (53.6 - 63.2%) -- guaranteed 2HKO
252+ SpA Deep Sea Tooth Clamperl Surf vs. 252 HP / 252+ SpD Clefable (154 base Special Defense): 219-258 (55.5 - 65.4%) -- guaranteed 2HKO after Leftovers recovery
252+ SpA Deep Sea Tooth Clamperl Ice Beam vs. 252 HP / 252+ SpD Kyurem-W: 198-234 (43.6 - 51.5%) -- guaranteed 3HKO after Leftovers recovery (i found a switch-in again!)
No real switch-ins again as you can see, but Clamperl lacks the versatility of Pikachu so it definitely shouldn't be looked at yet, maybe once the dust clears. It seems pretty worthless against teams that can provide continued offensive pressure, or have lots of priority. Plus it has competition from the much more consistent Manaphy, who I briefly considered mentioning here.
Thick Club works similarly, and I think Marowak might be better than Clamperl overall. Marowak might be worth a thought too, it has a great damage output and can 2HKO stuff like Lando-T with Double Edge.
On Gengarite: A consensus needs to be picked for the rules about this. Shadow Tag is not allowed in OU due to a complex ban, but neither is Lucario holding Lucarionite, and that's allowed in this metagame. If the definition of "Ubers Pokemon" for your God was refined, we might get somewhere. The way it is now, it could be interpreted as:
>any Pokemon tiered in Ubers
>any Pokemon legal in Ubers but not in OU (adds Soul Dew Latis, SD+Pass Scolipede, Shadow Tag Gothitelle)
If the Ubers pokemon are held to Ubers clauses (which makes a lot of sense) this allows Shadow Tag. It also lets you break Baton Pass clause on your God. You could argue that this is the proper way to handle having something like Mega Kangaskhan as your God, since you take the stats of the base form, and Kagngaskhanite being banned in OU on Kangaskhan is a clause rather than a tiering choice (?). But if they were held to OU clauses, which is also reasonable, then it outlaws certain gods and Shadow Tag. OU also doesn't have a Mega Rayquaza clause, so a complex rule would need to be added for that, since it is technically a clause, not a tier above. I think. Wow this is really fucking stupid.
I kind of rambled there but hopefully you get the point. I don't know much about the intricacies of tiering and clauses though, so I might be talking out my ass. Either way it's not in my hands to decide.
On Arena Trap: My first gut instinct is that it isn't broken. Dugtrio probably warrants more testing. If it takes a large Attack stat (or special attack too I guess) from something, that's still not really enough to beat some of the bulkier pokemon in this metagame. Even with 180 base Attack it struggles to 2HKO stuff like Clefable and friends, meaning that it's pretty worthless against stall. Not to mention the common defensive Gods beat it too (Giratina + Arceus burn it or pick it off with priority, Lugia just laughs). Against Hyper Offense teams, it might get one kill before it is picked off by priority, not to mention that all Deoxys teams save for Deo-D have at least two mons faster than it. For example, look at the Deo-A team sin(pi) posted above this. Dugtrio is outsped or outprioritized by 5/6 mons. I get that a lot of the time Dugtrio's role is to beat that one mon it can, but that doesn't really mean it's broken. And it still needs Focus Sash to accomplish anything, meaning that it isn't really all that powerful. All the priority just doesn't help.
And yeah, Trapinch is still pretty bad too. You could give it a lot of speed though if you wanted.
I think i need some sleep now
