With all the new changes lately to our attack system and changes to raid bosses AP in WoLK. Have any of you done the numbers to see which enchant is the best for our weapons?

Ex is good for CS and DS but how much AP do you need for it to be great.
Mongoose seems to work really well with Marta
heck Salvagery is still good if folks cant afford the other two.

has anyone ran the numbers or have a link to someone who has?