Landorus Therrien form
Adamant nature
Ability-Intimidate
Item-focus Sash (because of 4x ice weakness)
Earth Quake-STAB, awesome move, hits digging foes
Stone edge-coverage, hits flying foes
Hammer arm-Good fighting move, takes out many types, recoil doesn't hurt a lot
Outrage-Takes out dragons

Landorus Incarnate form
Mild Nature
Ability-Sheer force
Item-Life Orb
Earthquake-STAB, same reason as before
Stone edge/Hammer Arm-Coverage
Iron tail-power boosted with ability and Life Orb (+69%)
Grass Knot-Water Coverage