I'd most likely be an elite four because i like the concept of being one of the "four heavenly kings". As for type, i can't give a definitive answer. Narrowing it down to 4 of my favorite types, i'd either be; in order of favorites: 1. Fire 2. Steel 3. Ghost or 4. Ice
Fire Team: Charizard, Volcarona, Chandelure, Magmortar, Typhlosion, Arcanine
Steel Team: Steelix, Scizor, Aggron, Bastiodon, Magnezone, Bisharp
Ghost Team: Gengar, Chandelure, Trevenant, Dusknoir, Froslass, Cofagrigus
Ice Team: Walrein, Cloyster, Glaceon, Avalugg, Froslass, Lapras