Duellist

Unlike your typical Rogue, the Duellist thrives on the Battlefield even observed in plain sight by their opponent, instead using their natural expertise to go with the flow of battle to outmaneuver and outsmart their enemys. While this makes them fierce combatants on the battlefield, losing your flow or being forced to rapidly change targets can have a big impact on your performance in a fight, though mastery of it will make even the strongest opponent kneel

Level 3: Battle Stance

You training has gained you 2 different stances you can alternate between. You begin combat in the Offensive Stance

Offensive Stance: While in this stance you gain a Bonus to your attack rolls equal to half your Proficiency Modifier rounded up

Defensive Stance: While in this stance you gain a Bonus to your AC equal to half your Proficiency Modifier rounded up

Level 3: Intimidating Presence

You gain the following Cunning Actions:
Their cost increases to 2D6 at level 5, 3D6 at level 11 and 4D6 at level 17

Pressing Ridicule:(1D6) (Requires Defensive Stance) 
You attempt to demoralize a foe in 30 feet of you. Roll a Intimidation Check against the Targets Wisdom +15. On a Success the target becomes goaded, giving them Disadvantage on attack rolls against creatures other than you until the start of your next turn. Change your Stance to Offensive at the end of the turn.

Retaliating Counter: (1D6) (Requires Offensive Stance) 
You ready yourself for an incoming attack. When you get targeted by a Weapon Attack, you can use your Reaction to make a Weapon attack against the attacker, striking with a Ranged Weapon if necessary. You benefit from only half your Sneak Attack Dice when using this attack. You can only use this reaction once per activation of Retaliating Counter. Change your stance to Defensive at the end of the turn

Level 9: Stance Mastery

You are able to change your stance in battle more fluently, giving you additional benefits with your Cunning Strikes

Crushing Words. When using Pressing Ridicule, the Target also suffers a penalty to its Attack Rolls until the end of your next turn, equal to half your proficiency Modifier rounded up, when you succeed.

Uncanny Counter. As part of your Retaliating Counter Reaction attack, you may additionally use your Uncanny Dodge.

Level 13: Swift Strikes

Whenever you change your stance, you may move up to half your speed without provoking opportunity attacks. This stacks with the Withdraw Cunning Action.

Level 17: Perfect Battle Flow

Your abilities get augmented by the stance you are currently in

Offensive Momentum. Whenever you hit a creature with your Sneak Attack, you can attempt to strike a second time with advantage. This second strike only benefits from half your Sneak attack dice and cant use Cunning Actions. This can target a second creature if you are able to reach it.

Defensive Preparation. You gain an additional reaction for Uncanny Dodge. Additionally, you can use Retaliating Counter on all Attacks against you, not just Weapon attacks.