originally posted by ghost42
Try something like:
Salamence, Latias, Flygon, Kingdra, Bronzong, Magnezone.
This team will minimise your weakness to Ice, however you'll still have 4 weaknesses to dragon (as Dialga is the only Dragon Steel type).
Salamence with a Modest nature, Choice Specs or Life Orb and Draco Meteor will OHKO most thinks not steel or Blissey.
Latias will be Wish support and is a decent Special wall.
Flygon has the dangerous STAB Outrage/ Earthquake combo (only resisted by Levitate Bronzong and Skarmory).
Kingdra only has a weakness to Dragon, decent all round stats, great offensive STAB and a great ability, Kingdra is one of the best mixed sweepers in the game imo (at least while it is raining).
Bronzong will set up Stealth Rock and Rain Dance for Kingdra and can pack a punch with Gyro Ball and a Relaxed nature.
Magnezone will switch in on many attacks the opponent has and will trap and take out most steel types that resist your STAB dragon attacks. I suggest a Timid nature with a Choice Scarf.