His control of the Wind Spirits was the strongest but Dilan had never really focused on that.
He had always been a lot concerned about the overall efficiency of his Rings of Infinite Elements Constitution and the Mantle of Elements ability rather than the efficiency of only one Elemental Spirit.
That's why he didn't question why the Wind Spirit was powerful enough to easily burst the head of the Earth Dragon open when he attacked using it.
Afterward, Dilan left everyone behind because they would die whether he intervened or not. It didn't really matter.
Dilan swam around the Shiron crater and checked each and every corpse to make sure that he could collect all Essence crystals.
He absorbed the Essence crystals and his stats increased drastically. Being a Level 27 Tier-2 Ascender was his biggest advantage.