As I said, I just repelled Jhen Mohran in Rumble in the Great Desert a couple of hours ago.
I got my best armor set (Barroth U), my best Dragon element dual swords (Insectirippers), plenty of Mega Potions, Potions, Herbs, and Whetstones, and set out for the Great Desert.
I saw this as a siege - instead of searching for a single moment of victory, this was about running Jhennie out of steam and continually hitting her!
It just annoyed me that I merely ran her off - I WANT TO CARVE HER!
When do I get the chance to "rumble" with her until either she triple-carts me or I cause her to stop breathing?