Actually,
this choice was not difficult for Han Yi.
Prior to this, he had already mentally prepared himself that if Age Candle Heavenly Venerate were to be replaced and needed to return to the Ancient Great World, he would certainly follow.
Otherwise, if he stayed at Demon Witch Mountain, returning to the Ancient Great World later would require a long time, as he would inevitably have to journey alone without the power of Demon Witch Mountain.
Moreover, to traverse three Dao Domains, at least a strength of the Outer Path Realm was needed, and ordinary Daoist Fruit Realm would not be safe.
Regarding his 390 Dao Realm incarnations that he had developed on Daoist God Continent, he had a plan prepared.
No one specified that these incarnations had to stay on the Daoist God Continent, so Han Yi planned to pull all these Dao Realm presences into his Divine Aperture World, carry them with him, and truly "farm" them to provide "skill levels."