You should run Impish on Skarmory so Brave Burd isn't weakened, and Skarmory is also a better Defogger than Empoleon, unless you can predict the switch to Bisharp and Scald. Your team has no switch-ins to Earth Power Heatran, so just keep Empoleon alive, etc. Tornadus-T is also a threat. Im thinking Scarf T-Tar over Krookie Munster, but you should keep it. Tornadus isn't very common.
More Threats:
Just keep them in mind and play around them.
Pretty Powaful team [: