I'll keep the explanations short
Use Corviknight > Zapdos. Lightning birb is pretty much dead in this meta with all the knock offs and toxics flying around. Corvi allows you to scout for what move Lele, Kyurem, Dragapult lock into while allowing you to check Weavile and Bisharp with body press. Also, you're only gonna scout. You are only gonna wall Lele out of the first three. The ev spread is to survive two freeze drys from specs Kyurem after rocks with the rest put into def
Galarian Slowking > Ferrothron. Since metal birb is now the main steel type, there is no reason to keep durian. Spikes may be nice but with how good and common Corviknight is, chances are, those spikes aren't staying for very long. Galarian Slowking keeps your ability to offensive check fairies while providing fs support for your wall breakers. That ev spread is two survive specs Pult shadow ball and a banded surging strikgs without rocks
Do not use life orb on offensive Garchomp unless you are on hyper offense. Life orb sucks because Garchomp will be taking some hits and you do not want it to die f you wanna sweep. Leftovers is to provide some chip recovery although lum berry could be used for those pesky toxics. Also, even on hyper offense, use this set but just go life orb. Edgequake Garchomp is pretty much dead because there are no targets that would die to it and stone miss is stone miss
I changed Urshifu for Dragapult to provide speed control and another special attacker. With the amount of rocky helmet users around, it isn't uncommon for its wall breaking days to be cut short. Buzzwall is also rising in usage in response to all the Weaviles running around and those have helmets which is a death sentence for this guy. Specs Pult is pretty much click shadow ball until everything dies so it's the same boat as Urshifu
That Heatran spread is the spdef one it uses. It allows Heatran to outspeed neutral natures Agislash and Magnezone
Finally, use soft boiled on Clef. If you aren't using soft boiled then why use it in the first place. This evspread is the one smogon has on its analysis so I dont' know what id toes
https://pokepast.es/d46ff5f2c1e4200f
That's just a sample team but to give you an idea, spdef Lando is common to check Heatran while tank Chomp makes knock off users and Urshifu's life miserable. Fini is common because it checks stuff like Pult, Weavile and Urshifu. Buzzwall is rising to check those last two but not as common as Fini. Offensive Garchomp and Dragapult are still at the top of their game and surprisingly, Rillaboom has fallen off
