Deception is just as viable as madness in pve. Stop with the misconceptions and discouraging people from playing a well rounded spec that CAN top the dps meters in ops.
The last patch gave Deception a nice boost and people should try the spec for themselves.
What this guy said^
Deception can pull pretty much the same numbers as madness but has far more burst.
Edit: Sorc and assassin pull relatively the same DPS, so it's a matter of range/melee and bad *** double bladed lightsaber or a stick you never use ;].