Milotic A(+) --> S

This may seem like a stretch but I honestly don't know why Milotic isn't S. It's easily the second-best mon in the tier and should be at the same rank as Doublade. Arguably its even better than Doublade but that's another matter that I won't get into.

If you take a look at the VR right now, Milotic pretty much sits on half the tier while also having the ability to fit on virtually any playstyle, a trait shared only by - arguably - Weezing-Galar and Doublade. Bulky Waters are pretty much mandatory right now and having a mon that can fit on pretty much any archetype you want barring HO is really variable in this meta. Scald + Ice Beam with decent base Special Attack also means that its surprisingly annoying to switch into. Even Heliolisk, arguably one of its best exploiters, hates being chipped repeatedly by Ice Beam, especially if its Life Orb.

The upsides of Milotic greatly outweigh its downsides, a key trait in any S rank mon. Putting aside other bulky waters where it delves down to a PP stall war, switch-ins are surprisingly limited. Tsareena, Roserade, and Rotom-Mow are 2HKOed by Ice Beam, though the former two can just run Synthesis to resolve this. As I mentioned earlier Heliolisk doesn't like switching into repeated Ice Beams, and while physical wallbreakers can break past it, they all risk being burned by Scald, excluding the rare Toxicroak.

The biggest reason I think Milotic should be S-rank, however, is how constraining it can feel on building. You don't just need a Water-check, you need a Milotic answer. No, they are not the same thing. Most Milotic answers either detest chip from Ice Beam or Scald or cannot switch in directly due to a potential burn. I don't have to mention set up (unless you're Toxicroak) due to Haze either. Milotic is stupidly fat and just doesn't die. Even when you find yourself running countermeasures to it, nine times out of ten it will do something or just wall your team anyway.

For a tl;dr version, Milotic should be S-rank due to its splashability, imposing presence on the meta in general, and how valuable bulky Waters are right now. If you did read all this, thank you. That is all.