After Dilan witnessed everyone's most basic flaws, he witnessed a few more things that attracted his interest.
They fought and traveled for a whole day until they had finally cleared the Crimsonwood forest from most monster hordes.
At first, the others were rather confused and unsure why Dilan wasn't trying to take down the Tribe of the 12 Apostles right off the bat.
However, after some time passed, everything started to make sense, frustratingly enough.
Dilan focused on observing the others to make sure that he understood their combat prowess, strong points, and weaknesses as well as possible. He even learned how fast they could circulate mana through their body and how long adept they were at utilizing their abilities in the middle of a battle.
Using his Mystic Eyes, it was no problem for Dilan to find out everything he needed to make sure that his first evaluation of everyone was not wrong.