thundering blast needs to be removed
it should be replaced with "empowered chain lightning"
this talent will increase the base dmg of CL by 25% and CL will stun each target it hits for 1 second and applies a debuff making the target vulnerable to lightning strike (increase dmg and/or crit %) for 20 seconds
this will call for a change in backlash
backlash should now only affect the sorc himself, instead of a stun, after the bubble is consumed by dmg the sorc's incoming dmg is reduced by 33% for 5s and 33% of dmg taken is reflected back to the attacker for 5s
that fixes the lightning tree offensively and defensively imo
As much as I would like 7.5 to 8k chain lightnings I will have to say this is a bit broken