http://www.wowhead.com/?talent=IiMriRfzVtbobxZxx0z
I was demo spec for 2 years, thought id change things up. This is a 41/7/11 build, and its pretty hot. The shadow trance (instant cast shadowbolt) pops A LOT, so i suggest u get a mod that gives you a heads up when it does (i use necrosis). With this, you get FIVE dots, and with using things like shadowbolts and drain life, i max out on my dps around 750 dps! (thats in greens and blues)! Unstable affliction is great because stupid healers always despell it, and watching them take a lot of damage is lol. Just make sure that u have A LOT of +shadow damage. Nothing else matters. Also, instant cast howl of terror, owns in any battleground. This is builds only issue is in PvE with the high dps, it can cause massive agro, so be careful unless u have a godly tank. After specing to this, i saw my place in the damage meters go from one of the farther back as a CCer, to one of the top dpsers, competing with DPS heavy fire mages. A really good and fun spec, should try it out