My team has been eliminated from ADVLTL so I figured I would make a post on my thoughts on this metagame since I've never really talked about Orre at length despite being *around* for quite a few years now. I'll open with the disclaimer that I'm not gonna talk too much about the tour itself. I was really busy for the regular season, I spent every week except week 2 in a different state (or country) and was making safe, rushed teams to load on mobile and click with. That being said I of course had fun and was happy to go positive given the environment I was playing in, both in terms of my location(s) and the strong quality of opponents in the field.
I found a tiermaker that I looked over for a few minutes and arrived at this after giving it some thought. I'll break it down by tier.
Tier 1:
Latios is just the best Pokemon in the format to me pretty simply, and I prefer the Calm Mind + Sub set that I started using a while back in whatever Mt. Battle tournament I played in. You really don't need much more than a fast and powerful Dragon Claw to rip through teams given there's very few viable resists in the tier. I like Substitute because it helps to avoid Paralysis and people putting you in checkmate positions with Explosion.
Metagross and Zapdos stand out almost equally to me but I think Metagross gets my #2 pick because it has the most important quality in this tier which is that it resists Dragon Claw (normal resist is also pretty important to not get owned by CB Tauros, and Clear Body is pretty important to not get nerfed to shit by Intimidate switchins, but I digress). Offensively it does great work with Lum/Persim + Swagger and potentially Agility, not to mention threatening Explosion. Metagross definitely feels like the most essential physical attacker in this meta every time I go to build.
Zapdos, currently the undisputed king of ADV DOU, still stands out excellently here in comparison even amidst the lati twins and boom users. A fast and powerful Thunderbolt + Hidden Power coverage of choice in addition to EQ immunity just makes building pretty simple. After adding a Lati and Metagross you really have to ask yourself why you wouldn't want a Zapdos. I like Sub + HP Grass the most to really maximize the strong Metagross matchup and gain leverage into Swampert, but HP Ice, Thunder Wave, and Light Screen are cool as well (hell I ran Drill Peck in week 5 to combat my Shedinja PTSD...)
Latias rounds out tier 1 to me but I do have it as #4 pretty firmly in my mind. Latias is a utility mon first and foremost, because if you wanted an offensive pick you'd be running the blue eon twin instead. That's not bad, but it often means you're gonna be putting more eggs into one basket, aiding them with a Swagger boost or screens support and a fast Dragon Claw or coverage move to throw in some chip damage. That being said, assuming you don't get crit at a untimely moment, fast screens support and something to enable your physical attackers is great, and there are many mons in the metagame that it can simply click Dragon Claw in front of because you've still got get through a bulky levitating Dragon.
Tier 2:
Snorlax is a special wall that can run Curse to turn itself into a sweeper that patches its below average PhysDef or can just lean into winning trades by running Self-Destruct and threatening kills every turn. I wrestled with putting it in tier 1, but I think the susceptibility to Intimidate, as well as being the most hax-prone mon in the metagame due to its Speed stat, are enough reasons to bring it down to 2. It also does run into some 4MSS, as you really want to run Protect on all sets to be safe from Boom but then miss out on some much appreciated coverage, often Shadow Ball for better output into Latis and the occasional Gengar.
Starmie gets to play above the 110 speed tier which is huge. It chunks the dragons and kills Arcanine with Hydro Pump, gets to click Reflect before CB Tauros can Double-Edge you to a pulp, works as a great revenge killer from the back. Simple and effective mon.
As someone who prefers Latios to Latias, I'm absolutely in love with Arcanine in this tier. If you wanna go for CM Latios sweeps, really the only two guys you need to immediately worry about are Snorlax and Metagross, so it's really nice that there's a Pokemon that can Charm Snorlax to death, one shot Metagross, and still have a free move left to run Helping Hand to further assist in Latios sweeps. It definitely has its bad matchups but I think the utility is so great that it goes above Tauros for me.
Tauros is still super threatening though. CB Tauros has a fast and immediately damage output that basically no one else in the tier has and still gets some utility out of having Intimidate. It can't really pivot like Arcanine can due to its mediocre bulk but it is just very easy to line up kills and trade favorably.
Tier 3:
Raikou is kind of funny because if you look at the mons I ranked ahead of it on paper it has some pretty questionable matchups and not much utility but in reality it's just another example of raw Speed being king in ADV. Either revenge kill a 40% lati or Metagross or set up a CM in the midgame and go for the win from there.
Clefable is the best Follow Me mon which I think was severely underrated the last time I played this metagame and it + Shedinja handed me a pretty bad L in week 4 so I stole it for week 5. Bright Powder redirection is super cringe and probably the worst part of the tier but it's legal and evil so why not utilize it. The attacking moves don't matter too much but it does get Seismic Toss, coverage options, and plenty more utility moves should you want them.
Swampert was one mon I really liked that I never got to bring this tour. In theory nothing kills him which is pretty neat, but if you wanna run Snorlax and Metagross then running Swampert can really drag down your speed tiers if you aren't smartly gameplanning how to get the advantage and I really did not have time to be in the lab like that. Still, great bulk and typing + solid offensive coverage will never be bad, even if it's not a full standout.
I personally don't like Tyranitar too much but I would feel cringe ranking it any lower than 3. Sand Stream enables Registeel which is evil but neat, and also cripples Leftovers setup guys or helps put things in revenge kill range for a Lati or Starmie theoretically. Also has a coveted Normal resist and decent lati/zap matchups so I think all that comes together to rank it here.
I debated putting Marowak 4 but I do think I wanna keep it in 3, there's a lot of mons that it enables through LRod and I think even though most people are over GyaraWak these days there's more to be done with Moltres and Suicune and the powerful EQ is nothing to ignore as well. (Also just briefly from what I recall skimming replays maybe people were sleeping on GyaraWak a little too hard this tour... we'll see if it makes a playoffs appearance)
Tier 4 and 5
Not gonna cover all these guys at length but these are basically the niche mons that I think can be viable and would maybe recommend looking into if you wanna play a more experimental build. Tier 4 has my demons registeel & shedinja + fringe viable gengar + marowak partners, tier 5 are guys I haven't used in ages or ever but I think can be neat, the other two regis in particular seem cool for their ability to wall the specials/physicals respectively, I assume everything in this tier can kinda be implied what their role is.
tl;dr
Latios > Latias
I don't remember a lot of Arcanine being used but I really love that fella
Swagger is less cringe than I expected, Brightpowder and especially Follow Me Brightpowder is Cringe
Dear god I never wanna see Shedinja again
Despite the above two comments I had a lot of fun, I hope I get to play this meta again sometime soon and not like another full year+ from now lol