Zangeshu and Ridia were definitely the ones having the most difficulty in this test. In the end, Zangeshu only had one arm to fight with, and after several days, he was running out of energy. It was thanks to Ridia's innate ability and his harsh training given by Rean that he got this far.
The good news was that there weren't many Transition Realm Disciples coming after them. At least not as many as Rean, Roan, Kentucky, and Rifindio experienced. That's because the Transition Realm participants were doing much better than those at lower or higher realms.
Naturally, since the disciples of the sect were having trouble eliminating those participants, that also meant there weren't as many of them free to attack Zangeshu and Ridia. That also contributed to him and Ridia having traveled most of the distance to the sect in the twins' group. They have already surpassed the 150,000 kilometers mark in the days that passed of the 250,000 necessary to reach the sect.