Probably gonna get flamed for some of these opinions but...
A lot of mons really could be #1 spot, but imo mlop is better then all of them if just slightly. The mon is good on and against basically any team style, especially due to it's nigh unmatched speed tier bar scarfers and weather speed doublers, it exerts great pressure at all times weather running the pup or pivot set, yall know lop is rly good and will probably be good forever.
Weavile is kinda just broken, as it murders just about anything if you give it the oppertunity to do so, as it's cb set basically two hits the entire tier and traxel + knock is just a stupid combo, add suit to stuff switches and rly good priority, and you get one of the biggest threats in the tier. Honestly vile might have been above lop cuz of it's ability to destroy things with it's sd z set, but it's sr weakness and being outsped by koko holds it back just a bit.
Fini is just a really good mon, even though I don't find myself running it that often, fini is very obviously potent and I can't ignore that, it defensively checks just about everything that isn't a grass or an electric, misty terrain is broken utility, it's a great fogger, and taunt + whirlpool and other sets like natures madness and just scald in general make it very not passive which is a huge flaw most bulky waters suffer. Also while it didn't impact my rank that much, I do feel like scafini should be mentioned sheerly because it's suprise factor is great and it's a surprisingly potent cleaner that's decently hard to stop late game and needs more love.
Magnezone is just really damn good, specs is fine and can be pretty threatening on occasion, but imo the underrated star is scarf zone, being able to deal with fast sciz, which is great in the age of sand tomb, but most importantly trap kart, limiting it to at most one kho which is huge for basically all non ho playstyles, scarf zone also offers a really nice speed tier outpacing the 80-serp speed tiers which is really nice when complemented by it's honestly really good dual stab and volt. Zone has some flaws, and in some mu's just does nothing which sucks, but it's potential and ability to enable entire teams carries it to the fourth spot
Clefable can just do some much, and no matter what it chooses to do it's usually great at it. CM lorb bolt beam sets are legitimately threatening as they put a ton of pressure and have little response. Clef is just a generally great rocker as well, as blast + flame or bolt beam basically covers every fogger. Una clef, while flawed, is one of my favorite mons to stick on semi stall and balance, probably due to my unjustified fear of dragons but hey, it's really good at what it does. Also aroma/heal bell and knock clef are really underated and need to see more use in this meta.
I know this is not allowed but I want to do it anyway, serp and volc are pretty much the same mon for me anyway, really annoying hard to stop breakers that you have to have specific checks for or you just die. They are both flawed and prone to getting hard walled on occasion (especially volc), but both are more so annoying because of their niche sets, volc on stall is legitimately terrifying at times being a very potent mincon, and niche hps like rock or ground or fog serp or taunt serp have messed me up and can be really threatening.
Koko is kinda insane honestly, every balance team just dies if you make one right read on their ground, and it's vile outpacing speed tier is amazing, and the fact that it has boots and even z sets to deny the counterplay of relying on it being specs makes it all the greater of a mon. Also screens koko lucha is still good imo, especially if your team isn't prepared for it.
Ima be honest, I don't like using tran in this meta that much, it is a massive threat don't get my wrong, but I tend to find myself preferring other fires like molt blace and vic over it as I can't help but feel tran can fall behind due to it's speed tier against offensive teams. Objectively though, tran is a very potent mon and should in all honesty be ranked higher, as it has a ton of very threatening moves it can run, alongside incredible utility with flash fire. However, I don't find it better than any of the mons I put it above. One thing to not is that tran has a ton of underutilized sets such as steel beam z and firium z alongside air balloon which I think should be experimented with
Spike demon, that can sudo check everything and is a glue mon that I genuinely prefer to lando. One of my favorite steels as well. In the age of trying to find kyu checks, ferro does a great job and has tons of options and utility. While its lack of ways to block fog is annoying, knock + team support can easily alleviate this issue. My main issue with ferro is that if you make a single wrong switch and your opponent doubles you, you loose all momentum and your opponent may have just killed your only check to their big threat. This can turn it into a big liability in some games if your not careful, but it's still an incredibly potent mon.
Great speed tier, makes fat viable, stored power reflect type sets are genuinely very hard to stop unless your opponent has a sableye, and it gets obliterated suiters even with aura if you don't catch them on the switch. This flaw is substantial enough that imo it holds mlati back to this spot, but it's still an amazing mon that defines a playstyle, which makes it just on the cusp of top ten.
Also no ground in this list is intentional because I hate them all and they all suck at their job, if you wanted a mon in on this list, put them on as an unofficial number 11.