Some further details on what needs to be done can be found on Path of Exile Wiki:To-do list/Automatic upgraded from and issues can be posted on the talk page. Conqueror's Efficiency is a unique Crimson Jewel.
2% reduced Mana Reserved
4% increased Skill Effect Duration
3% reduced Mana Cost of Skills
The stone may yet bleed.
A simple tool to price check your items in path of exile by "copy and paste". It is that simple!
Price in Leagues