Brawler

At 5th monk level, you can alter your entire attack pattern when using flurry before making any attacks, changing it into one great power attack. 

A power attack combines the flurry and base attacks together into one great strike. You cannot make both a power attack and a flurry attack on the same turn. If you would gain other attacks, instead treat them as attacks combined into the power attack.

A power attack is still treated as a flurry attack for the purposes of other abilities and effects.

The power attack has a +2 bonus to hit and block DC, and has all damage dice increased by 1 size category(or 1d4 extra on reaching 12) per extra attack combined into the attack.

At 5th monk level, your flurry and power attacks have their critical strike range extended by 1.

At 5th monk level, choose an upgrade:

• Catch projectile - You can spend a reaction to catch a thrown weapon or projectile. You can throw it back as a reaction.

• Critical power attack - Power attack has its critical range increased by 1.

• Armored brawler - You gain proficiency with medium armor. You can choose to alter flow, applying a bonus to block checks instead of extra instances of block. You gain 1 extra block at the start of combat.

• Fists of steel - Increase your unarmed attack damage by 1 size category. The critical range of your unarmed attacks is increased by 1.

• Leaping power attack - You can leap up to half your movement speed and make a power attack. If making a power attack from at least a 1/2 movement speed jump distance, grant it an extra attack to add to it.

• Musclebound - Gain a +2 bonus to strength. Gain a +1 bonus to athletics checks. Your thrown weapon attacks have a +20/+40 increase to range.

• Hardened - Gain a +2 bonus to strength saves and con saves, reduce damage taken by 1, +4 max HP.

• Raw power - All bludgeoning and force damage you deal is increased by 1d4.

At 6th monk level, choose another brawler trait upgrade.

At 6th monk level, your rest dice maximum is increased by 2.

At 6th monk level, you can spend 1 extra rest dice when using flurry to increase the number of extra attacks it grants by 1.