My favorite combinations involve such things as Dusclops + Metagross/Salamence and other such things.
Dusclops
~Imprision/Helping Hand
~Protect
~Earthquake
~Ice Beam
Metagross
~Meteor Mash
~Earthquake
~Agility/Light Screen
~Explosion
Salamence
~Dragon Dance
~Earthquake
~Aerial Ace
~Rock Slide
The premise is to use either Salamence or Metagross, and Imprison and Helping Hand, respectively. Imprison will prevent ANY Pokemon from hitting Salamence with Ice Beam as long as Dusclops is active as well as preventing them from using Protect. With Helping Hand, you can power up Metagross's Explosion by 50% while being completely immune to it, yourself.