After the battle with the group of natives interested in Minos' wings, the group from the Spiritual World traveled for 15 days, moving quickly without many stops to rest or explore the areas along their way.
They were on the run from potential enemies who had already been warned by the Sovereign who had survived the battle. Since they didn't know much about these beings, they couldn't take any chances.
If a single being above level 100 decided to go after them to avenge those deaths or to go after them because of Minos' wings, they would be screwed!
So they fled as fast as they could, taking care not to leave any traces but also not taking any chances to collect things.
Taking advantage of the fact that they were still within the area Strin had given them, they moved smoothly, finally reaching the end of the 'safe area' they had so much information about.