A fun set I came up with amidst all the Shellder spam is Shell Smash Binacle holding Berry Juice.
Binacle @ Berry Juice
Ability: Tough Claws
EVs: 20 HP / 180 Atk / 60 Def / 196 Spe
Adamant Nature
- Shell Smash
- Razor Shell
- Cross Chop
- Shadow Claw / Stone Edge / Stealth Rock / Poison Jab / whatever else Binacle has.
Basically, this set is never killed by Shellder's Rock Blast, even after SR, allowing Binacle to come in, set up Shell Smash, and then OHKO Shellder with Cross Chop (can only be done after residual damage, but seeing as it probably will have had residual damage a sit had to set-up....), or Stone Edge, if you wish to be able to kill Shellder regardless of having residual damage or not. It hits 14 Spe, which is faster than standard Shellder, as nobody runs Jolly. Shadow Claw is the preferred move for the last slot tho cuz Pumpkaboo is a thing.
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So, most of everything I'd have wished to say regarding Shellder has been said, and I do believe it, and every other Shell Smasher, should be banned. (Can someone remind me why Shell Smash to its entirety isn't being suspect tested?) Shellder has great bulk, a great ability, an incredible movepool of Rock Blast + Icicle Spear + priroity, an item to make its moves flinch almost 50% of the time, and a good Spe and Atk stat. Basically, Shellder has everything it needs to cause havoc in LC UU.
Now, onto Gothita. While it is true that Gothita has a field day with msot of the top threats of the tier, it is also true that the majority of these threats have to have received residual damage in order for Gothita to its job efficiently. As, if certain bulky mons, like Pancham and Skrlep, that are weak to its moves aren't weakened enoguh, they have a chance to live Gothita's hits and KO it back with ither STAB or SE attacks. That being said, I do believe Gothita should be removed for the simple fact that Shadow Tag is inherently broken, and if you couple that with a mon like Gothita which has decent power and decent Spe, hose decent stats become quite terrifying, especially in LC UU. Gothita forces you to run either Stunky or Zorua on every team, as these are the only good Pursuiters, just to make it so Gothita can only kill one member of your team per battle. Gothita is still guaranteed a kill, which is pretty important to note, unless you have based prediction allowing you to switch Stunky/Zorua in as they switch Gothita in, but that's unlikely to occur.
Basically, ban both of these afflictions ASAP and save LC UU from its suffering, as we still have ways to go to make LC UU the meta we want it to be.