Lightning Slam Titan Concept - Need Advice

Hey everyone, I'm working on a new build concept that focuses on slamming with Falling Thunder. Without going into too much detail, this build has two big issues at the moment: 1) defensive layers since life/armor blow atm and 2) lack of ways to generate power charges to fuel falling thunder due to lack of access to Resonance.

I'm having a hard time finding ways to generate power charges since we won't have access to Resonance on the tree as this is a Warrior build. I've read some posts about using Profane Ritual on corpses to create PCs, but that wouldn't work on bosses since there are no corpses. Without buying specific uniques from trade, is the only option to generate power charges really just siphoning striking a shocked enemy? I would like to keep this build SSF friendly if possible.

Also open to defensive layer suggestions. Warrior side of the tree has some hybrid armor/evasion stuff but is too far from the good ES/evasion nodes near the dexterity side of the tree, and since this uses a quarterstaff we won't be using a shield which really hurts the ability for it to utilize block chance, and armor is..... yeah. It's probably possible to do a 2nd weapon set with shield but honestly that just sounds unfun to play.

Is a build like this even going to be possible with these limitations? What do you guys think?