Here are the stats for the nerfed version so you can decide what you wanna use.  All versions have less weakness to shock duration, only master version ignores reflect/absorption.

lvl 1-4: 15 shock over 2 secs, 5 area, weakness to shock 20pts 2sec (novice require, 40 mana) (unchanged)
lvl 5-9  30 shock over 2secs, 8 area, weakness to shock 40pts for 3sec ( apprentice require, 75mana) -slight nerf to dmg, 
lvl 10-14 40 shock over 3secs, 12area, weakness to shock 60pts, for 3sec(Journeyman require, 140mana) -slightly less dmg, more mana
lvl 15-19 51 shock over 3secs, 15 area, weakness to shock 80pts, for 4sec, (Expert require,  200 mana)- dmg nerf, +20 mana cost
lvl 20-24 60 shock over 4secs, 18 area, weakness to shock 100pts, for 4sec, (Expert require, 300 mana) - 33% less dmg, 20 more mana, not reflect/absorb immune!
lvl 25+  80 shock over 5 secs, 25 area, weakness to shock 150pts, for 5sec , (master require, 680 mana) - 33% lessdmg, 80 more mana, immune to reflect/absorb, no immune to silence anymore.