Chiming in about Thundurus and Focus Blast.
You can't even compare Tornadus-T to Thundurus-T. Why? Because one has a 95 BP 100 acc STAB move. Guess which that one is. The difference is that Tornadus-T needs Rain to work well, where as Thundurus-T is utterly different in that it works well in any weather. That's why Rain Dance is a good idea, so you can actually use your STAB.
Now on Focus Blast / Superpower, my response is why are the side effects or Superpower being neglected? PK, it's great that you can 2HKO that stuff, but what if there's two things you need to hit with Superpower? Tornadus is dead in the water then and needs to switch. It also drops Defense, allowing you to be more easily picked off by stuff like Scizor and even Breloom. 70 acc sucks, but so does -1 / -1. Superpower also makes you run a -(S)Def nature, meaning you're even frailer..sorry, but not even Regenerator is gonna help with that.
You can't even compare Tornadus-T to Thundurus-T. Why? Because one has a 95 BP 100 acc STAB move. Guess which that one is. The difference is that Tornadus-T needs Rain to work well, where as Thundurus-T is utterly different in that it works well in any weather. That's why Rain Dance is a good idea, so you can actually use your STAB.
Now on Focus Blast / Superpower, my response is why are the side effects or Superpower being neglected? PK, it's great that you can 2HKO that stuff, but what if there's two things you need to hit with Superpower? Tornadus is dead in the water then and needs to switch. It also drops Defense, allowing you to be more easily picked off by stuff like Scizor and even Breloom. 70 acc sucks, but so does -1 / -1. Superpower also makes you run a -(S)Def nature, meaning you're even frailer..sorry, but not even Regenerator is gonna help with that.