Arc Stormweaver help

Hi im lvl 47 now and the arc/warp stormweaver is falling behind.
I cannot beat Metkul before lava fills up nor Napiutzi arena gets so small
my damage is really lacking

Tree, I went with tons of lightning damage all the way up the tree, took a lot of spell crit chance, mana and Es regen bascially

Using Orb of storms to proc shock and Elemental storm, works really good, sometime gett 2 storms up at the same time

My main dmg is Arc/lightning warp for packs

my gear suck i have 200% spell/lighning damage but no + level to spells
The unique staff that procs sparks nd Doedre's Tenure gloves

My arc DPS is ~715

really struggling, can this be saved?

Thanks in advance

Had the same problem with Arc, used the ability you put on the ground that adds more spell dmg while youre in it, used conductivity aswell.
I BARELY made it while keeping everything going as much of the time as possible.
Had about the same DPS as you fyi.

I havnt tried other classes, but Sorc feels pretty bad, and as soon as i got Ball Lightning i went with an extra link in it.. big mistake, it is just terrible cant make it do any dmg.
In all irony no cold dmg on my tree except global spell dmg, icewall+comet almost doing better dmg than my Arc and Orb of Storms with Conductivity but its so incredibly slow to set up and not viable on bosses that moves or attacks all the time.
Adding the ground effect and Arc pulls ahead by a lot but thats so many skillpoints into it, i honestly dont know what to do with the Sorc everything feels like hitting with worse dmg for each higher tier, havnt gotten all the way up into getting Eye of Winter or otherwise. But i dont know whats wrong with the dmg.