Team Dump + Thoughts on the meta
M-Magearna HO:
Cookie Cutter HO. I really like glimm lead since it gets access to memento which can be used to force setup opportunities for mega magearna or any of the other setup mons on this team. I built this team with mega magearna in mind although realistically you can put any other setup mega in this spot and it will probably do the same thing tbh. The speed tiers in this tier are extremely unforgiving, Scarf Gholdengo is barely slower than the 151 speed megas, and therefore this team is very reliant on rking these mons with prio or keeping dnite healthy.
M-Heatran BO:
First saw this 6 on ladder and trial and errored the sets to get this team. Used this team to win a legends-za tour by pokeaimmd, so its def solid. M-Heatran is super consistant as a stallbreaker and spdef wall, stops you losing to most CM spammers barring keld & milo. M-Heatran also walls many DD/physical dnite variants and garchomps and can often trap and kill these mons if they come in attempting to tank magma. Parting shot rotom is a really nice tech lets you get band ttar in very easily. scarf genesect is great anti offense. Wish clef is a great glue which makes m-heatran very diffciult to remove. Band ttar is fun af, probably should have pursuit on the set somewhere (maybe over low kick) but set is strong as is.
M-scovillain pivot spam:
This team started off as a joke team, but i kept refining it and i think its actually really solid into current meta rn. M-scovillain coverage matches up surprisingly well into basically all of the defensive pivots/walls in this tier. It is extremely easy to get free subs vs mons you force out wich allows you to get free leech seeds on whatever switches in. Scovilliains low HP means that you end up healing back a lot of HP with giga drain and leech seed so you can easily spam subsitutes. Overheat is a solid nuke + setup move which lets you gain more healing back from giga. This set is heavily inspiried by the sub glare serp sets which are popular in gen 9 & 7, and works very well with twave support from mag. Tbf tho the core of this team is extremely strong and scovillain could be replaced out for a more viable mega if wanted
Thoughts on the meta

regular : UUbers bias speaking here, but i love the defensive utility this mon brings, magearna is extremely useful role compression and is incredibly flexible in the defensive pivot role too. While double dance and stored power sets are strong, they struggle to break past mons like heatran, melmetal, gholdengo and are shutdown by phazing/encore attempts pretty reliably. Overall its a good mon and keeps a lot the darks, fightings & dragons in check

Another mon who I think should stay, atleast while the 151 speed megas are around. Genesect currently works as a great anti-offense tool with scarf & espeed and has a great typing vs mons like Baxcalibur. Ngl though, shift gear sets are very hard to play around due to genesects insane versatility, it is also difficult to RK as it resists dnite espeed, bax ice shard etc...
mega

: Not gonna waste time here, there is no real benefit to keeping this mon, its incredibly forcing in how you respond to it and can very easily punish teams which do not respond correctly to it

Decent breaker with anti offense potential, does not really feel broken especially with corv, skarm, slowbro & clef exisiting. Feels like the mon really requires boots, rocks are very prevalent and gholdengo/annihilape are great blockers. Mega baxcalibur feels utterly underwhelming, it feels like regular bax with an item just outmatches it, the extra bulk doesnt mean much when you are losing 1/4 of ur hp just for coming in, often leaving you in range of a vacuum wave after you are finished setting up.

: Grouping these guys together as they are all insanely good, their speed tiers are obnoxious, the only pokemon who naturally outspeed them is mega-zeraora who cant be slapped onto every team. Many popular scarfers like gholdengo arent able to outspeed these mons even with max speed. m-absol stands out for being impossible to RK due to its ghost typing giving it immunity to most common forms of priority whilst also coming with its own technician boosted priority too. Idt they should be banned or anything as of yet as the meta still has room to develop although i feel like m-absol will almost inevitably get itself banned.