The way that the forces traveled to where Su was outside of the mirrored hills was simple. Those with the ability to fly partnered with the dragon or the mages to move much faster. Using wind mana to speed their movements was easily the best option for them. While those on the ground had prepared carriages or were running in formation.
Buffs from healers were also a perfect addition to those who wanted to get there faster. It was the single biff that could improve how everyone recovered from this quicker travel while also the buff that allowed them to even get there. Other supporters felt the same and ensured that they had buffed many before they found their own way on to a carriage to maintain those buffs over the trip.