I think it should be tested in Ubers first. I've seen some logs of uber battles but I honostly believe that with things Like Kyogre, Dialga, and Zekrom (Basically super powered Thunder in the rain) it'll be much easier to get past Inconsistent users.
No this really shouldn't be allowed on any ladder. I think a calculation earlier showed specs Ogre could barely break Octillerys subs at +6 so anything without Specs will really struggle against it. Add in Toxic Spikes and even in ubers this thing is just stupid. Its detrimental to a competitive game so when it is banned it should be banned from every ladder.