Even with Choice Scarf, Timid, and 252 speed EV's, it is still outsped by Tapu Koko, Unboosted Halucha, and Faster scarf users, so it will need max Speed to be effective. Also, HP Fire/Ground are the best Steel Killing HPs; Ground hits Heatran and Magnezone, but misses out on Skarmory, Celesteela, and Kartana, while HP Fire Hits Unscarfed Kartana, Ferrothorn, Skaymory, and Celesteela, but misses out on Heatran. Fighting won't KO Heatran, Skarmory, Celesteela, Ferrothorn, and Manezone, and should only be used in lower tiers where Stakatka, Sheildon, and Bastiodon caring Air Balloon are common. :P