Mine is better. 

Finish The Fight

Once per day you may use Assassinate against a creature that has not yet taken its turn that round. You apply all respective advantage and damage bonuses, as well as special maneuvers that you wish. 

Level 3: Assassinate

You’re adept at ambushing a target, granting you the following benefits.

Initiative. You have Advantage on Initiative rolls.

Surprising Strikes. During the first round of each combat, you have Advantage on attack rolls against any creature that hasn’t taken a turn. If your Sneak Attack hits any target during that round, the target takes extra damage of the weapon’s type equal to your Rogue level + Proficiency Bonus. 

---

Assassin Strikes

During your first attack in a combat you gain these sneak attack options. You can use these options at the same time as you use the cunning strike feature. To activate one of these features you must activate sneak attack on your turn, only on the first round of combat. 

Dreadful Strike: Strike swiftly to befuddle a target.

Force the target to make a CON save (8 + Atk Mod + PB) or be stunned until the end of its next
turn. 

Fearful Strike: Impose terror on the minds of your victims.

Make a charisma or intelligence check. A number of creatures equal to your Proficiency Bonus that you can see must make a Wisdom
save against the number you rolled, or take a penalty to their attack rolls and saving throws equal to a roll of one of your
sneak attack dice until the start of your next turn. Roll once when you make this attack to decide the penalty.

Rogue's Gambit: Go all in. Put forth maximum effort to end a target.

You must declare this option before you make an attack roll. If you miss the attack roll, you may try again if you have more attacks on your turn. 
Make a melee attack at disadvantage. If you hit a creature with this attack, you may change half of the sneak attack dice (rounded down) to their maximum values. 

If you crit with this attack, you may consider the same number of dice rolled as the maximum value in the same way. 

If you miss with this attack, you have put yourself in a vulnerable situation. Until the start of your next turn, creatures have advantage
on attack rolls against you, and you have disadvantage on strength and dexterity saving throws. 

Level 3: Assassin’s Tools

You gain a Disguise Kit and a Poisoner’s Kit, and you have proficiency with them.

Level 9: Infiltration Expertise

You are expert at the following techniques that aid your infiltrations.

Masterful Mimicry. You can unerringly mimic another person’s speech, handwriting, or both if you have spent at least 1 hour studying them.

Roving Aim. Your Speed isn’t reduced to 0 by using Steady Aim.

Level 13: Envenom Weapons

When you use the Poison option of your Cunning Strike, the target also takes 2d6 Poison damage whenever it fails the saving throw. This damage ignores Resistance to Poison damage.

Level 17: Death Strike

When you hit with your Sneak Attack on the first round of a combat, the target must succeed on a Constitution saving throw (DC 8 plus your Dexterity modifier and Proficiency Bonus), or the attack’s damage is doubled against the target.