In the end, all you need is sneak attack (doubles crit chance if flanking), the best daggers you can get (ones with high damage), and the chain passive that increases crit chance by 1% per attack, UNTIL you CRIT. You do not need all that much crit chance on your equipment.
No. Unforgiving Chain is useless enough on it's own but the passive that precedes it, Bloodied Prey, is even worse.
OP: 25% is good enough as far as crit chance goes (since Sneak Attack will get you to 50% if flanking) and that's easily attainable through schematics.
The
Dual Curved Blade has an offensive leather slot for crit chance and an offensive cloth slot for crit damage (provided you have
Dragon Webbing).
The
Dense Dual Blade Grip has slots for boosting crit chance and/or crit damage as well.