Hep with Shock Nova build

Hi.

I'm trying a Shock Nova build.
I've wasted most of my wealth this league experiment and I'm a bit broke, but here's were I've got so far: Shock Nova Ascendant
*in the link I don't have capped resistances but I capped them after realizing it

The idea is to get the Breachlord ascendancy and that way I won't need elemental penetration of any kind.

I'm using this dagger that basically gives me 40% more spell damage for free and some spell crit and increased spell damage.

This shield gives me some damage boost and resistances.
But with all that I barely do 300k damage.
I can switch to The Squire and get some extra 3 supports but I'd be losing on tankiness. And surviving is my priority now because my goal is to just farm a little to get this league's armour and then take a break (that's why I have the Craiceann's Carapace, to get some PDR and armour and because I can't craft a proper armour right now).

Is there any cheap change that could help me beat the breachlords? Right now I do no damage to them and they kill me after a while. Once I kill them I think I can farm normally and grind for the other 8 challenges I have left.

Thanks in advance.

Solved the puzzle: Light of Meaning (lightning damage) + Militant Faith + Swapping to The Squire + Purity of Ice. Ended up doing 1M damage and being able to survive the encounter. Now with the ascendancy I do 2.5M. Now I just have to figure out how to solve my PDR and chaos res problems because this league I'm dying a lot.