Poison you inflict with Critical Strikes deals 50% more Damage +0.5% to Critical Strike Chance per Poison affecting Enemy, up to +2.0% 
Toxic Delivery is a notable Ascendancy passive skill for the Assassin. It grants more poison damage to poison that was applied with a critical strike, and added critical strike chance per poison on an enemy.
Now grants 0.5% to critical strike chance per poison affecting enemy (from 0.4%)
10% reduced Damage taken from Damage Over Time Gain 20% of Physical Damage as Extra Chaos Damage against Poisoned Enemies
No longer causes you to recover 0.5% of your maximum Life per poison affecting enemies you kill. Now grants you +0.4% to critical strike chance per poison affecting the enemy, up to +2%. Now causes poisons you inflict with critical strikes to deal 50% more damage (from 30%).
Extra Chaos Damage now applies to poisoned enemies instead of bleeding enemies.
Bleeding you inflict on Maimed Enemies deals 30% more Damage. Added Recover 0.5% of your maximum Life per Poison affecting Enemies you Kill.
The Assassin's Toxic Delivery skill has been reduced to 30% more damage with Bleeding and Poison from Bleeding and Poison inflicted by Critical Strikes (down from 100%).
No longer grants increased Damage Over Time.
Extra Chaos Damage now only applies against Bleeding enemies, is increased to 20% (up from 10%).
Now causes Poison you inflict with Critical Strikes to deal 100% more Damage
Now causes Bleeding you inflict on Maimed Enemies to deal deal 100% more Damage