idk about the dark tower novel (only seen part of the movie, never read the books) but:
a Buccaneer can confuse a target for one round using his pirate jargon.
and just in case you got swashbuckler and gunslinger mixed (happened to me more then once, both uses deeds. i was looking for the swashbuckler buccaneer for a while till i found out i got them mixed)
-the Dashing Thief swashbuckler can daze, and on higher levels charm, a target who might be allured to him\her with a kiss (or similar interaction)