I would like to propose that for each Ability (Dent Armor, Renew, Filtration, etc) we create a category page. This way we can nest their Actions (Renew 1, Renew 2, etc) to them as well as and books or Items that grant this flavor of the Ability. This would allow the information trees to display as in the following picture;
I feel that this accurately displays the relationship between the Ability and the Skill Tree it relates to.
I'd love to hear other's ideas on the topic.