Supporting
B rank. It's not really good enough for B+ because it's piss weak, but it beats a lot of stuff, including Feraligatr, Smash Omastar, non-Heat Wave Archeops, Samurott, offensive Dragalge to an extent, and it sets up Spikes all over lots of defensive stuff, including Vileplume, non-Taunt Qwilfish, Audino, Uxie, etc. Some problems with it are that it relies on Thunder Wave to beat a lot of stuff, and it can't break much on its own. It also loses out on its strongest move, Gyro Ball, because of its reliance on Thunder Wave. Also, it is cute. Oh, and Iron Barbs + Leech Seed + Spikes racks up a ton of residual damage and can allow you to beat things you normally have no business beating.
Can we drop this to
A-? Like even lower would be cool to me lol. Vileplume is a cool pivot, and it's a nice check to Sawk, Feraligatr, and Shiftry, but too much stuff beats it. Even the aforementioned Pokemon can overwhelm it with hazard support, and considering that it is not weak to Stealth Rock, it's a pain that it needs Defog or Rapid Spin support in order to do its job effectively and consistently. It is also total setup fodder for Klinklang, SubCM Uxie, CM Spiritomb, Spikes Ferroseed, etc. Like it's a great pivot, but it is grossly overrated right now. Also, it is vitriolic and vile.
Speaking of things should drop, this should also be
A- or B+. Sceptile just isn't really strong enough unless it runs Specs, and that set loses tons of momentum because its STAB moves are inconsistent. Leaf Storm forces you out, while Giga Drain isn't quite strong enough. It's a cool Pokemon, and it's a great offensive check to Feraligatr and fast shit without priority. But it has too many things holding it back from sitting in mid A.
Drifblim is simply not C-. It is insanely good at throwing a team into disfunction, and checks every relavant rapid spinner extremely well, removing them with a simple Destiny Bond. SubSitrus is surprisngly just as effective as old AcroBlimp, and does just as well at crippling opponents with a combination of Will-O, SubDisable / DBond, and a powerful Acrobat, and once the sitrus is set up, even things such as Spiritomb and Shiftry are unable to check it, risking death by DBond or a cripple. The fact is, while Drifblim isn't as effective as it use to be, its unique typing and great team support with little cost on your part means that it is a great choice in many teams, pairing well with almost any setup sweeper, deserving C+/B-.
Drifblim isn't that good. It's usable, but it's not at all "insanely good at" fucking with opposing teams. Spiritomb beats it with Infiltrator Shadow Sneak, which means it's not even safe behind a Substitute. Shiftry has no business trying to Sucker Punch a Drifblim anyways because Drifblim will always be carrying a support move. A fast Destiny Bond is not unique (Mismagius, Haunter to an extent), its unique typing hurts it more than it helps it, and its Acrobatics isn't that strong because it doesn't have Flying Gem to back it up anymore. I wouldn't be opposed to mid C, but don't put that shit anywhere in B.