I think Monks get prof points every four lvls. Not that you're really gonna use them, coz your fists are your main weapon.
And btw, all warrior classes (Fighter, Ranger, Paladin) can get 3 * in TwoWeaponStyle. The Ranger is just suppossed to have a natural affinity for this fighting style so they get 2 * in it from the begining.
Oh yeah, Swashbucklers can get 3 * in twoWeaponStyle too.
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