POB: https://pastebin.com/eqhRKMru
Guide: https://www.pathofexile.com/forum/view-thread/2912755
Please ask any questions and I'll try my best to answer them.
This is my attempt at making a strong non-meta build in a league where any item you can think of, you can make.
General synergies are in Necromancer's Corpse Pact notable. COC allows us to autodetonate corpses through Asenath's and have reliable proc rate on Brands (we don't need any +1 brand notables). We almost always hit 20 stacks on penance detonations, resulting in massive chunks of damage.