I can see this thing actually being pretty threatening in the doubles environment. Rain and sand are very common teams and this thing rips them apart. Its gotta pretty decent defenses with resistances to earthquake, surf and discharge along with the ability to rape common double shit like rotom-w, landorus and garchomp.
Timid
252 speed, 100 def, 152 spec attack,
Sitrius berry
Leaf storm
Taunt/glare
Dragon pulse
HP fire/ground
Leaf storm for boosting and sweeping (duh) taunt to stop all the trick roomers that serperior baits in or you could use glare to paralyze stuff like excadrill in sand and landorus which is always nice. Dragon pulse for coverage and the HP depends on who you want dead more heatran or ferrothorn. Ferrothorn is pretty bad as it walls you and can stop you with thunder wave or heatran can just straight up kill you with flamethrower and wall you so pick according to your team. Evs are for max speed and power while the defense helps taking lando and excadrill out easier.