I had found on my Priest when levelling, Shadow Weaving was stupid as the mob was often dead before I had a full 5 stacks on it, which is why I left it and Misery off.

They're mainly PvP or PvE raiding talents because the total damage increase they give you grinding is quite pathetic.

Improved VE was mainly a filler, I'm at work doing this so I wasn't wholly concentrating, the points would be better spent in something like Blackout or more Shadow Affinity (although with 6% you should have little trouble with resists).