Poisoner

You have spent time learning/studying poison at some point and time in your life. You have an understanding of poison and living beings reactions to poisons entering they're blood stream, and know how to read alchemic formula and craft poison. Rouges who walk down this path are very effective at assassination's and slowing down or just out right knocking enemies out with their poison. 

Bonus Proficiencies

When you choose this archetype at 3rd level, you gain proficiency with the Nature and Perception ability's and when looking for poison ingredients you have advantage on the rolls.

Deadly Poisons

Starting at 3rd level, you are most efficient when attacking poisoned enemies, you have advantage on attack rolls against any creature that is poisoned and you gain the following traits.

• When you make a damage roll, you ignore resistance to poison damage. At 9th level your poison treats immunity as if it was resistance. But they cant apply the poisoned condition if they have immunity. 

• You can coat a weapon in poison as a bonus action, instead of an action.

• With one hour of work using a poisoner's kit, you can create a number of doses of potent poison equal to your proficiency bonus. Once applied to a weapon or piece of ammunition, the poison retains its potency for 1 minute or until you hit with the weapon or ammunition. When a creature takes damage from the coated weapon or ammunition, that creature must succeed on a Constitution saving throw with a DC equal to 8 + your proficiency bonus + your Int or Wis modifier on a success the creature takes half damage on a failure the creature take 2d8 poison damage and become poisoned until the end of your next turn. You can use poison you make with magic weapons such as a dagger of venom but you cannot stack poisons you created on top of each other it would just extend the duration another minute.
  
  Additionally you may learn how to craft other existing poisons by studying a sample them over the course of long rests equal the 1 x every 200 gp cost of the poison.
  Once you have learned a poison this way you can craft one of the poisons you have learned over the course of a short rest, the number of doses you make is equal to your proficiency bonus. 
  
  You can carry no more than 2 x your proficiency bonus of poisons.

High Tolerance

At 9th level you gain resistance to poison damage and advantage on saving throws against poison, you also gain proficiency in constitution saving throws.

Swift Poisoner

At 13th level you can attack a second time on a turn when you apply poison to your weapon with your bonus action. Also your poison last for both of those attacks during that turn.

Potency

Starting at 17th level, When you attack and hit a creature that isn't poisoned yet you deal 4 additional dice of poison damage these dice are equal to the poisons damage dice and the creature you hit has disadvantage against poison saving throws for 1 minute.