i dont have much time to post any in-depth rates, but all im saying is you get buttfucked by magnezone.
e: saw the last line... lol
i'd get rid of heatran and forre. replace toxic on ferro with spikes. and spikes on skarm with rocks. drill peck to brave bird. add a lati twin of your choice for fire resist/defog. i'll add more later if no one else comments.