Hi, nice team!
Unknown glaring weaknesses but I have a little 'changes to say. First, I propose to change the Evs spread Politoed giving 44 evs in speed
to outrun Choice Band Scizor and when it is being KO Scald kill him with increased power from the rain, then use this spread Evs 252 HP / 212 Def / 44 Spd
. In this way you avoid that maybe he'll kill you using Pursuit Politoed and then taking place after the Sandstorm from Tyranitar or Hippowdon, or maybe you use U-Turn and you have to change Pokemon turns giving the opponent. Now I want to change a little 'things between Mamoswine and Jirachi to make them more functional, I'd give Stealth Rock to Mamoswine instead of Icicle Crash, Adamant> Jolly and Focus Sash> Life Orb, so then I would give Protect> Stealth Rock Jirachi
. All of this for several reasons, Jirachi with Protect becomes a completely different Pokemon, no doubt more resistant and more difficult to send KO, and Mamoswine is perfectly capable of placing the Stealth Rock, Whereas it is supported by a Rapid Spinner and Focus Sash , that make him a powerful Revenge - Killer as well as placing the Stealth Rock, Adamant nature, obviously for more offensive power at the end Dragonite even if it exceeds in speed kill him anyway with Ice Shard more Adamant nature.
Tentacruel to say that you can safely replace the Timid nature with the Bold
, as to outrun Rotom-W (which is the purpose of the 16 Evs in speed Cruel Sub), you want to get the 16 Evs in speed, Timid nature not required, in return, the Bold will increase the defense.
At this point last thing council Tornadus-T with Life Orb
. With Life Orb if you make the change you need to do Naive> Timid
and Superpower> Focus Blast
and also Taunt / Rain Dance> Air Slash
The advantages are that for example if you get stuck on Hurricane against Tyranitar, it will only use you Pursuit making you out Tornadus-T, while Life Orb, you can hit it with Superpower putting KO With Taunt instead you can easily stop Ferrothorn by placing hazards or use you Leech Seed, and in general, you can prevent the Setup any Wall as Tornadus-T will always be faster.
With Rain Dance instead, you solve a weakness to Sunny Day Team, which would be completely destroyed by what you would do as the entrance of Ninetales Rain Dance, then using a Hurricane free, which will make him very badly. Rain Dance would help you to win more easily the Weather War. That is all.
Good luck, with your team!