This is the spec that i will be using till 50 then i will get sexy felguard in demo tree

Level 10-14 : 5/5 Improved Corruption
Level 15-16 : 2/2 Improved Drain Soul
Level 17-19 : 3/5 Suppression
Level 20-24 : 5/5 Fel Concentration
Level 25-26 : 2/2 Grim Reach
Level 27-28 : 2/2 Improved Life Tap
Level 29 : 1/1 Amplify Curse
Level 30 : 1/1 Siphon Life
Level 31 : 1/1 Curse of Exhaustion
Level 32-33 : 2/2 Soul Siphon
Level 34 : 1/5 Shadow Embrace
Level 35-39 : 5/5 Shadow Mastery
Level 40 : 1/1 Dark Pact
Level 41-45 : 5/5 Contagion
Level 46-47 : 2/2 Improved Howl of Terror
Level 48-49 : 2/2 Improved Curse of Agony OR Nightfall.

whats your plan post 50?

Once i get to 51 i will spec

http://www.wowhead.com/?talent=AZfgczcidc0st

Then i will use this to lvl to 70 then i will spec back to Affliction which will be

http://www.wowhead.com/?talent=AAMrdRfzqtboZxx0tr

This all depends on what we need when im 70 ofc