Bruiser

This subclass is all about using the ancient art of Attacking, they sacrifice some survivability for more damage output. 

Bruiser Strength And Proficiency

When you take this subclass, you lose proficiency with medium armor, and gain proficiency in one skill of your choice. Also your fighter health die becomes a d8(5 for fixed hp), and any weapon you are holding is considered magical.

Superior Hit

Starting at 7th level, when you attack, before you roll the dice, you can choose to take a -3 for your attack roll, and if the attack still hits you get a +5 to damage. Also your weapon attacks score a critical hit on a roll of 19 or 20.

Extra attack

Beginning at 10th level, you may attack one extra time when you take the attack action on your turn.

Extreme Superior Hit

Beginning at 15th level, when you make a weapon attack, before you roll to attack, you may choose to take a -7 on your attack roll, and if it still hits you get a +16 to damage.

Immeasurable Assault

Beginning at level 18, you are completely immune to disadvantage.