It'd be a good idea to switch Rhyperior out for Skarmory; it makes a great physical wall. For moves, try Brave Bird, Roost, Stealth Rock, and either Spikes or Whirlwind. For EVs, go with 224 HP, 252 Def, and 32 SpD, and as far as nature's concerned, try Impish. It'd be super-effective against electric attacks though, but I guess you have Garchomp to take care of them. :] It'd be weak against fire moves as well, but Blaziken could endure those hits pretty easily.