Slayer

Just a different take on the Assassin subclass. More about combat then the deception out of combat.

Bonus Proficiencies

When you choose this archetype at 3rd level, you gain proficiency with the Alchemist Supplies and the Poisoner’s Kit.

Precise Strike

Starting at 3rd level, you have advantage on attack rolls against any creature that hasn’t taken a turn in the combat yet. In addition, any hit you score against a creature that is surprised is a critical hit.

Superior Mobility

Starting at 9th level, your walking speed increases by 10 feet, also you gain a swimming and climbing speed equal to walking speed. Also, when you make a melee attack against a creature you don't provoke opportunity attacks from that creature for the rest of the turn, whether you hit or not.

High Alert

Starting at 13th level, you have advantage on initiative rolls, you can't be surprised, and attacks from hidden enemies don't have advantage on you.

One-Shot!

Starting at 17th level, when you attack and hit a creature that is surprised, it must make a Constitution saving throw (DC 8 + your Dexterity modifier + your proficiency bonus). On failure, treat sneak attack damage as maximum damage. On a success, roll sneak attack as normal damage.