Froslass is amazing both competitively and aesthetically, preiod; in early D/P everybody thought it would be medicore, but they were sure wrong!
Yes, just run sets like a Trick lead or the standard lead...
I think Theorymon has this idea, but here is the UberLass:
@Focus Sash
6Atk/252SpA/252Spe
Hasty nature
~Ice Shard
~Shadow Ball
~Spikes
~Ice Beam
(I promise to rate your team as soon as this "I could be banned crap will go, aka April 19th)