Start saving Frost badges for T10 peices. The 4 piece T9 bonus is one the weakest set bonuses in the game.
For your single target rotation; Judge > CS > DS > Cons > Exo You can probably experiment with swapping CS and DS around. Once you get 2 pc T10 DS always goes ahead of CS. I don't think you're quite at the gear level where HoW starts dropping in value. It can get inserted anywhere when the mob is below 20%
And for multi-mob pulls, Cons > DS > Whatever you feel like.
Gem and enchant your gear. By my count, you're missing about 7 gems/enchants. If you are a raider, see if you can get into a party with a Draenei. If so, you can swap out both your +hit gems.
Forth, and fear no darkness! Spears shall be shaken, shields shall be splintered! A sword day...a red day...ere the sun rises! Ride for ruin and the world's ending!