Great story! The first time I was playing this build and tweaking it, I made a lot more mistakes I would say than you did. Totally forgot to post the character that started this all
https://te4.org/characters/251655/tome/ ... 9ac4bdc0aaThere's a lot of things I did wrong in the build, like overinvesting in cursed aura, taking adept, and putting other points in the wrong place, but losing teaches a lot.
The beginning is the hardest part for this build, and I would recommend relying a lot more on activatable items like torques, or getting lucky and finding flamewrought/cloudcaller/eel skin armor to fight everything at range. Later on after hitting lvl 16 and having 5/5 sanctuary and mark prey, this build can basically walk through t1s and blow everything up with bumps or just running circles around them. The build doesn't really pick up at all until the first mindpower proc item is found, usually shard of insanity, eye of winter/summer or serpentine cloak, which will allow you to run circles around enemies and deal a ton of dmg without ever bumping them.
I would also recommend taking armor of shadows as a first prodigy to give more armor to protect from melee. 2nd prodigy is superpower to give more dmg, and the mindpower gets much stronger the more mindpower proc items are found.
Fighting in the late game is weird, usually you want to bump once to activate cursed miasma then run around in it without bumping to get mindrot on a ton of enemies which gets mind procs. The reason for not bumping is the high amount of movement speed from surge, cold iron acorn, etc allows mindrot + procs to do more dmg than bumps in the same amount of time. Running around in the miasma increases stealth, which is very powerful for defense, and enemies inside it can lose track of you and attack their friends or themselves for even more protection. The mindprocs, while doing a ton of dmg, also inflict some crazy effects like creeping darkness which basically makes you invincible to ranged enemies, sunder mind to destroy mental saves and land more effects.