The Story

in 2020 the Modder called Electromasta made a mod called Electro'sTweaks for Hades on Nexus mods.
The mod contains Level 10 Weapon Aspects, Level 5 Keepsakes, and doubles the talents on the Mirror of Night.
I downloaded it and I really love his mod. But on 17 Aug 2022 he deleted his nexus account, I don't know why.
Luckly I still got his final released version of his mod. I want to share his amazing mod with everyone again.
He released Looseleaf Override Version, mod importer version, keepsakes only, Weapon aspects only and mirror only.
100% credit to Electromasta, with all the respect and love.

Detail

This is his personal overhaul to progression including Level 10 Weapon Aspects, Level 5 Keepsakes, and doubles the talents on the Mirror of Night.

Weapon Aspects
Weapons can now be upgraded from level 1 to level 10, with costs: 0, 1, 1, 2, 2, 3, 3, 4, 4, 5.
Level 1 of all perks costs 0 and Zag Aspects have better 'starts' to encourage experimentation.
Level 1 -> Level 5 costs 6 Titan Blood total, a cost reduction with about the same as vanilla
Level 1 -> Level 10 costs 25 Titan Blood total, a significant investment but greater values than vanilla

Zagreus Aspect Rebalance
- Sword starts at 10% Attack and Move Speed and scales to 35%
- Spear starts at 5% Critical Chance, Throw Range, and Damage and scales to 25%
- Shield starts at +5 base damage and 5% Damage Reduction and scales to +20 / 20%
- Bow starts at 5% Critical Chance and Dodge Chance and scales to 20%
- Fist starts at 10% Damage and Dodge Chance and scales to 30%
- Rail starts at +5 ammo and 5% damage and scales to +20 / 20%

Keepsakes
Keepsakes Scale to level 5, taking 75 / 100 chambers to level to 4 / 5 respectively.
Force Spawn Keepsakes (that up rarity of a god) give an extra chance for epic and legendary boons.
Rare: 7% per level to 35%
Epic: 4% per level to 20%
Legendary: 3% per level to 15%

Mirror of Night
Doubles the talents on the mirror of night.
Base Talents are unchanged.
New talents are significantly more expensive.

Miscellaneous
Rail has 20 base ammo, so I don't end up shooting myself when I use it.

Installing Looseleaf Version
- Reset all Mirror of Night perks and backup your save data (and game data if you want, otherwise use steam verify integrity) before installing.
- Then, unzip looseleaf zip into Hades folder.

Installing Mod Importer Version
- Reset all Mirror of Night perks and backup your save data (and game data if you want, otherwise use steam verify integrity) before installing.
- Install Mod Importer, Mod Utils, and SJSON Module
- Then put Electro's Tweaks mod folder into the Mods folder that is generated by Mod Importer and run the Mod Importer python file.

Uninstalling
- Reset all Mirror of Night perks and reset your game data (verify steam integrity).
- Mirror of Night + Trinkets rest just fine, but Weapons over level 5 get really cranky after uninstalling. (Weapon upgrades still remain even after uninstalling)

Question - How to solve the Weapons over level 5 get really cranky after uninstalling?
Answer - Before uninstalling the mod you need Pony's Quality Of Life mod made by LRevolution Pony's Quality Of Life at Hades Nexus - Mods and community (nexusmods.com). By using Blood Refund option and collect all the Titan Bloods back from weapons then uninstall. This method will solve the problem 100%.

You can play together with Pony's Quality Of Life and Electro'sTweaks I see no problem. I guess. I'm not actual Hades Modder so I don't know exactly.
However, Electromasta made this mod during older version of the game so some of the weapon's level and keepsakes still need to be correct with the help of Modders from Discord server https://discord.gg/UDDUDYAW

To prevent the bugs and future problems
- Always create a new clean save file just to play a mod. (Always backup your main save file first)
- Don't add other mods. (Each mods aren't made to be compatible with each other)
- Don't try to fix by yourself. (Report the Modder about bugs first)
- Don't be lazy. (Read everything about the mod first)