Dual Spark Totems - Need help to improve it

Hi everybody,
I actually play a Scion Dual Spark totems lvl 81 started from Lighty's build :
https://www.pathofexile.com/forum/view-thread/1585297/page/1
But with some differences because a friend did me change some things for increase dps a first time and used what i have.
My Character : "NevrScion" : https://www.pathofexile.com/account/view-profile/nevrdid/characters

Some Stats :
Life 3178 ; Mana 415 ; Shield 669

Spark dps :
herald of thunder + artic armour + wrath => 11k + assasin's mark bonuses
artic armour + wrath => 10k + assasin's mark + elemental withness bonuses

*2 because 2 totems (*8 projectiles ? not sure)

My problem is that I can do t10 but slowly and i die easily if i run too fast. So arenas-museums rare corrupted maps are hard to do sometimes and slowly all times.

So i search a way to increase my defense and possibly my dps and farm speed.
Maybe switch totally main skill but don't really see how because of the Ancestral Bond passive.
I thought about convert to this one : https://www.pathofexile.com/forum/view-thread/1526658 but looks hard too.
So I hope now someone already tried a nearby build and can give me some tips.
Thanks.

edit : forget to say it but i can actually reset my passive tree.