[@Sigil]By my count, Kafka's Yuri, Sho's Sigurd, and Fox's Etzo were all in the building along with Cricket. I think Gowi's Sibela was heading towards it, but Bai Suzhen's Dia and Jester's Nadijah were at the Gerudo fortress instead fighting the Moblins.

GM said Oasis was just a stone's throw from the Pillar where the Knight was taken by Rath and the other Shiekah, but I don't know if it's also close to the Fortress or not. It would actually probably be more convenient if the Gerudo Fortress was on the way or inbetween the Pillar and Oasis, so that Rath's group and the Knight could come upon the battle just as the others from the HQ are entering it as well.