This was a discussion that our group started last night and I wanted to open a discussion with other folks about it. I'll present my interpretation and proposal along with the passages I have found that support this.
Everyone, including Duelists, can remove Brutes with Raises on a 1 for 1 basis regardless of how many "Wounds" you can deal with a Raise. What this means is that Duelists attack Brutes just like everyone else and cannot take down "Weaponry Ranks" of Brutes with a single Raise.
My reading of the rules to support this:
Brute Squads (pg. 191): Brute Squads are a 'consequence' in an Action Sequence. They do not roll dice, they have only a single value (Strength) which determines how many Wounds they deal at the end of the Round as a Consequence for not dealing with them. They have no 'Wounds'.
You can attack a Brute Squad, you can Convince them to surrender, you can Run away from them...basically anything can be done to a Brute Squad to defeat them on a 1 Raise / 1 Brute basis.
Under Duelist Maneuvers (pg. 235), all of them deal "Wounds" and do not have any special mention for Brutes. Therefore, since Brutes don't have Wounds, the maneuvers cannot be used to remove multiple Brutes with a single Raise.
The only evidence I can find to the contrary is an example on page 184.
GM: You have a dueling style, right?
Heinrich: Yes! Eisenfaust! I use the Slash Maneuver, spending one Raise to cause…(checks
character sheet) THREE WOUNDS!
GM: That’s your Weaponry Skill, right?
Heinrich: That’s right.
GM: One of the Brute Squads gets knocked down from Strength 5 to Strength 2.
While this is a clear counter example, my opinion based upon reading the core rules (Brute Squads are a Consequence and have no Wounds) is that the example is not the 'rule of reference' and that it is likely possible that the example is not correctly written (I've seen many times where an example doesn't match the rules, for whatever reason).
What is the proper way to run this? The 'GM' side of me would like Brutes to be dealt with the same by everyone; otherwise, it just increases the power of duelists more and makes advantages like Reckless Takedown a lot less useful as Weaponry goes up.