Hydreigon is good perhaps, but Latios is better (even if I can't stop MGross). Anyway I Thought to change clefable to LandT leftovers defensive to set Stealth rock, so Heatran could have set with Lava Plume/Protect/Toxic/Taunt. And play ScarfKeldeo obv with Icy wind + Latios CM.
So definitelly...