>>15033880Haxorus is (arguably) the worst Physical Dragon-type right now, as it's shallow movepool and mono-STAB are magnified by the existence of Fairy types, on top of its older issues with its relatively low speed and bulk. Druddigon, for all of its failings, actually has some versatility over spamming Outrage and such, and is slow enough that it can afford to be tanky.
Not that I'm recommending Druddigon, by the way. Garchomp, Salamence, and Dragonite are all excellent choices for a physical Dragon-type sweeper; pick one.
Most people run Aegislash as a physical set-up Sweeper/Tank/Cleaner. However, there are a number of highly effective Mixed or even fully Special-attacking sets. We're still trying to figure out how best to use it. My advice: don't run Choice items, and only invest in Speed if you're running an Autotomize set.
Blastoise isn't going to be very effective unless you're going to use Mega Blastoise. If that's not what you're into, Tentacruel is probably your best bet for a bulky spinner.
As far as special sweepers go, Delphox... isn't very good, I'm afraid. Volcarona is probably the best replacement for Delphox, as it also justifies your use of a Rapid Spinner while raining fiery death upon anyone foolish enough to let it set up.
Crobat is kinda cool. It got all sorts of new treats this generation, and might finally break in to the top tier of competitive play.
One thing I noticed about your team is that there isn't really much of a "core" of Pokemon whose play styles complement each other and whose typings cover each other's weaknesses. I would recommend a Fire/Water/Grass combo, with M.Blastoise or Tentacruel, Delphox or (hopefully) Volcarona, and Ferrothorn. Ferrothorn is a highly effective wall that can lay down Spikes and Stealth Rock for your team, and matches well with M.Blastoise and Volcarona.