PoE builds similar to 3:29 A10 Inquisitor Penance Brand of Dissipation Playthrough

Only using 1 weapon, a dagger... to cast a spell, no offhand! That's funny isn't it? 4.5m DPS! I'm not sold yet since i'm not sure if clearing will feel nice with it, i'm still leveling the character, so far it's quite powerful What do you think? What other unique battlemage build idea you can think of?

Penance brand as hierophant using the reworked arcane surge on the cheaper side. Just sad that Penance brand is not much used and overlooked over the past several leagues, currently only 6 visible on the poe.ninja crucible ladder including me. It's often seen as a scaling build only used with great investment or with an aurabot. Bonus point, the mtx is wonderful and penance brand is one of my favorite skill. I understand it's hard to make it feels good and you can feel discouraged when you first try it but with a good understanding it's lovely to play (but beware you need to click a lot),

First time posting a build, looking for critiques on ways to improve it. Tried to use fairly basic gear to simulate. For 3.19. Core ideas, new 40% Mom+eldritch battery to solve mana and add a bit more tankiness and value to dual regen of inq. GMP to shotgun creeping frost. Daressos courage for 55% spell block/75 if blocked attacks recently. Things looking to gear for once it gets going- increased max fire res, get the last couple % left to cap suppression. curse on hit ring to free supports up for RF. Generally adding % increase

I created this pob in my spare time trying to pull a skill that I like a lot, I think it was relatively cheap, and the damage looks great! Is there something wrong with pob? Is it possible to optimize further? ty. ;)