T&N – All 3 options you have in mind are viable, so I can appreciate you having some difficulty in arriving at a final choice. I’m unsure myself, so I’ve been trying to think about certain factors, such as this is their third fight and they have no issue fighting naked, it’s an agreed arrangement where they know the setting and what to expect well in advance, and they have time to think about and prepare for this final battle. I’m also wondering how you will get them to the barn – it’s outside of town, so I’m thinking they may each be arriving by horseback.
With that said, I’m seeing one scenario with them wearing blouses with no bras, riding pants, and riding boots. They strip their blouses off before fighting while trash-talking and threatening each other. The pants are ripped during their frantic fighting, until they come off and they fight naked, but still wearing the boots because they are in a barn with rough flooring etc. and they can use them for kicking. This is just one idea, I’m sure you have many and all of them are going to be good no matter which you choose.