Parry Alternative Idea

[Nifft]

Monsters have Parry: increase AC as a Reaction.

Battle Masters have Parry: spend a die to reduce damage by 1dX.

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How broken would it be to replace the Two-Weapon Fighting bonus-action attack with the monster version of Parry? (I.e: Add your Proficiency bonus to your AC as a Reaction, and you can decide this after you see the attack roll.)

Rogues (and now Rangers) seem to have plenty of fun things to do with their Bonus actions already.

[Vogonjeltz]

How broken would it be to replace the Two-Weapon Fighting bonus-action attack with the monster version of Parry?

There is a feat for this. Defensive Duelist, PHB page 165: requires a finesse weapon, you use the reaction after you've been hit (so after the roll has happened), and add's proficiency bonus to AC for that attack.

Yeah, yeah, it'd be pretty broken if everyone got that feat for free just by having a second weapon in hand.