Looking at the wording of Flurry of Blows, I may be overthinking it, but the description of the feature (PHB, p. 78) says:
Immediately after you take the attack action on your turn, you can spend 1 ki point to make two unarmed strikes as a bonus action.
Does this imply that a monk must finish the attack action (initial attack + extra attack) and only afterward can optionally use the Flurry of Blows bonus action immediately, or does take mean that a monk must start/commit to doing an attack action, and before finishing the attack action (or even make any attack rolls), initiate Flurry of Blows to get 2x unarmed strikes. Can the flurry attacks be before (or be interspersed in any order) the two regular attacks?
The thought is to gain the benefits of the Open Hand monk's knockdown ability tied to flurry of blows, and benefit from the prone status on the 2x regular attacks.
- First Flurry of Blows attack, target fails save and becomes prone
- First "regular" attack - target dies
- Move to new target, use second Flurry of Blows attack, target fails save and becomes prone
- Second "regular" attack.
(Alternatively using the Flurry benefits to remove reactions, etc.)