Hi, nice Sunny Day Team!
I would change the set of Ninetales in a more defensive as the
Chesto Rest. Why do you always recommend? Why is the most resistant of all, and provides you with the sun in the field, the extension also possible thanks to Rest allows Ninetales to recover all the energy when it is about to lose all HP curandoti from any annoying status, for instance poison , paralysis.
I noticed that your team has no guaranteed income against Tornadus-T under the rain to do any major damage. To solve this problem I apporterei two changes.
First I would change the Rapid Spinner in one place also capable of Stealth Rock. I would use
Donphan, which in addition to out of the way the Hazards, also has Ice Shard as an important priority move, which helps to kill the Dragon opponents.
Second thing now that you Donphan who places the Stealth Rock, I would change Landorus-T with
Cresselia, which helps against Tornadus-T and the Dragon and the Sunny Day Team also works very well.
Good Luck, with your team!
Sets