You forgot 2 important dragons. The Latis. And Empoleon is a better switch in to them than Heatran because he isnt ohkoed by EQ and takes nothing from Surf. Tbolt would be a problem but thats a rare coverage move. Also Empoleon can switch into Azu without Super Power with ease. He isnt quite as good as Ferro against Azu but much better than Heatran, its also not ohkoed by Diancies EP and can tank an EQ from Altaria better than Heatran ever could. Yes it doesnt stop Chomp or Zard but Heatran cant do that either against Chomp and against Zard only if Zard forgoes EQ for Roost. Against Metagross it can avoid the 2hko from Hammer Arm after one round of protect (look at the calcs). It can also check Gyarados, Gengar, Clefable (as long as Clef isnt the last mon), Talonflame and Starmie. With protect it can even take advantage of choiced Keldeo sets.
252 Atk Metagross Hammer Arm vs. 248 HP / 200+ Def Empoleon: 184-218 (49.5 - 58.7%) -- 71.1% chance to 2HKO after Leftovers recovery
252 SpA Mega Diancie Earth Power vs. 248 HP / 60 SpD Empoleon: 214-254 (57.6 - 68.4%) -- guaranteed 2HKO after Leftovers recovery
+1 192+ Atk Altaria Earthquake vs. 248 HP / 200+ Def Empoleon: 184-218 (49.5 - 58.7%) -- 71.1% chance to 2HKO after Leftovers recovery
252 SpA Life Orb Latios Draco Meteor vs. 248 HP / 60 SpD Empoleon: 129-152 (34.7 - 40.9%) -- 57% chance to 3HKO after Leftovers recovery
0- Atk Life Orb Latios Earthquake vs. 248 HP / 200+ Def Empoleon: 127-151 (34.2 - 40.7%) -- 43.7% chance to 3HKO after Leftovers recovery
Do what you want with it but that post basicly "forgot" to mention every single positive trait Empoleon has.
252 Atk Metagross Hammer Arm vs. 248 HP / 200+ Def Empoleon: 184-218 (49.5 - 58.7%) -- 71.1% chance to 2HKO after Leftovers recovery
252 SpA Mega Diancie Earth Power vs. 248 HP / 60 SpD Empoleon: 214-254 (57.6 - 68.4%) -- guaranteed 2HKO after Leftovers recovery
+1 192+ Atk Altaria Earthquake vs. 248 HP / 200+ Def Empoleon: 184-218 (49.5 - 58.7%) -- 71.1% chance to 2HKO after Leftovers recovery
252 SpA Life Orb Latios Draco Meteor vs. 248 HP / 60 SpD Empoleon: 129-152 (34.7 - 40.9%) -- 57% chance to 3HKO after Leftovers recovery
0- Atk Life Orb Latios Earthquake vs. 248 HP / 200+ Def Empoleon: 127-151 (34.2 - 40.7%) -- 43.7% chance to 3HKO after Leftovers recovery
Do what you want with it but that post basicly "forgot" to mention every single positive trait Empoleon has.