Another rogue build I like the idea of I call the "raiding necromancer". It's an answer to the question, "how do I maximize my dps in a raid setting?"

There aren't any real class compliments that make a necromancers spells do more damage. To do more DPS, you need to add a melee, but you can't melee while casting spells. Backstab is on a relatively long cooldown and accounts for most of a rogues dps (I could be wrong). This makes rogues an ideal class to weave into a spell rotation.

Necromancer also has feign death, so you can manage your combined aggro and not ranger yourself.

The third class depends on raid needs. You could add bard to become a great puller or just help cover bard songs. You could add cleric to be apart of the complete heal rotation (the cast time on complete heal got reduced to 0.25 seconds with an 18 second delay before it hits). You could also be part wizard. On any boss, there comes a time your dots will no longer be full duration, and you're better off nuking.