pEPC
Priest EP Calculator
Provides a EP estimation for each item you hover over.
I made this for myself in order to play a little on Netherwing, but guess other people can use it as well.
Note: Only works for Shadow priests. Feel free to fork it and change it for your class
Note: It assumes for sockets 9 EP (9 Spell power gem)
Note: It does not consider enchants, socket bonus or current gems.
EP coefficient source: https://docs.google.com/spreadsheets/d/1X-XO9N1_MPIq-UIpTN13LrhXRoho9fe26YEEM48QmPk/htmlview?sle=true#
