Whirling Dervish[]
@3rd: Defending Dervish: You gain the Two Weapon Fighting style and whenever wielding two weapons and unrestrained you may add your Prof mod to your AC against melee attackers.
@9th :Extra Attack : You gain a stack of the Extra Attack feature
@13th: Iron Fang Whirlwind : You may Dodge using your Cunning Action, may apply your Defending Dervish AC bonus against ranged attacks as well, and if you have not used your Sneak Attack on your turn you may expend any number of your Sneak Attack die, rolling them and gaining Temporary HP till the start of your next turn.
@17th: Dervish of Death : When using your Attack action you may give up your standard attacks to instead make one attack against every enemy adjacent to you, applying Sneak Attack to every enemy applicable and when you use a Bonus Action to make your Two Weapon attacks you gain an additional off hand attack.