The Storm Wraith
This build can be a little difficult to start up but once up you are an Immortal lightning god.
If possible drop well spring upon entering mission as the boost in energy will help with startup.
Dont use anything until you see mobs
just before entering initial combat pop 4 then 3 ... I recommend waiting on gloom for energy orbs to start dropping.
once up run to the enemy mobs and immediately [Cathode Current] will proc. once youve procced once its easy mode from then on.
IF YOU BOTCH THIS YOU WILL BE LOCKED OUT OF 3 FOR CLOSE TO A MINUTE!!!
It isnt totally important to use 3 after 4 but I have found a better success rate in doing 4 first. think it has to do with energy [Regen] timing and a really fine line of minimum energy needed to run.
Once 4, 3 and 2 are up you can just walk around and things die, I've found only in mid to late SP I have to actually fight.
1 is just there if you want to beef up defense in an area without actually being present the whole time but can be used offensively really well in late SP.
I did opt to run without Arcane Energize and went with Arcane Blessing for more survivability. the lack of Arcane Energize is noticeable but once you get past the struggle of a botched startup a few times youll get the hang of the dos and donts and dont be afraid to bail to a safer location to run down the CD timer on 3 as it is 100% mandatory to be running at the same time as 4.
Also I slotted Gloom in 2 but it can easily be swapped out with something else like [Banshee]'s Silence.
Have fun and cheers