My personal opinion is to skip demonic sacrifice, master conjurer and demonic empowerment. I picked up Fel domination and master summoner as an Oh S**T button.

Of course, your preference may vary, but this is what I went with as I hit 50:
http://www.wow-europe.com/en/info/ba...00000000000000


This is what I'm working towards at 70: (I may take one point any put into Metamorph if it really is all 'that'
http://www.wow-europe.com/en/info/ba...00000000000000