Disreputable

The disreputable is the lowest of the low, they will take every opportunity to easily and swiftly eliminate their foes, no matter how underhanded the technique is. they focus on attacking others when their back is turned and dashing away, using a foes clumsy attack as an opportunity to attack, coating their blades in a moment's notice, and bleeding their targets until they can no longer fight. 

Poisoner's Blade

When you choose this archetype at 3rd level, you gain proficiency with the poisoner’s kit and herbalism kit. You can also apply poison to one of your weapons as part of your cunning actions. 

Bleeding Cuts

Your attacks can now leave a temporary effect, causing your victim to bleed out. This special attack deals half your sneak attack die at the start of their turn if they fail a constitution saving throw DC equals 8+dexterity modifier+profecincy. The target automatically succeeds this saving throw if they lack blood and the target can also get rid of the bleed status effect if a healing spell is cast on them. 

Cunning Attack

when you use any of your cunning actions you can make a single weapon attack.

Opportunist

You can use an enemy's clumsiness against them, when someone misses an attack within your reach you can use your reaction to make an attack against them. This attack can have sneak attack damage with it, even if you have used a sneak attack already. So long as all other rules apply.

Hamstring

When you are directly behind a target whose size is Large or smaller and hit them with an attack you can choose to hamstring them, causing your target to become permanently knocked prone. the save for this attack is a constitution saving throw (DC 8+your dexterity modifier+ your proficiency bonus). Any form of magical healing, or a long rest, negates this affect.