The reason Tyler had decided to learn a Regeneration skill before the three skills necessary for the activation of Wisdom of Uriel was that two of those three skills were Divine Tier, making them harder to comprehend much less learn even with a high compatibility rate.
The required skills were Clairvoyance, World Divination, and Divine Appraisal. Amongst those three skills, only Clairvoyance was a Normal Tier skill and the rest were Divine Tier, making their effects quite impressive as Tyler picked up the large tomes and read their descriptions.
There was a higher-tiered Clairvoyance skill called Absolute Clairvoyance that was also at the divine class but it didn't seem like the requirement of Wisdom of Uriel needed the high-level version of the skill and Tyler didn't plan to overachieve.
