Attention : The author is Japanese. There may be mistakes in spell and sentence.
Skill Tree 1 is first skill tree. Skill Tree 2 is added new job and new active skill. Skill Tree 3 is after skill rebalance patch. (Change of the maximum level of some skill) Skill Tree Revemp is after KR Elsword update of June 27. (incomplete yet)
The descriptions for the Revamp Tree are all "Lord Knight" as default. For each skill information, please check the Elwiki or the Forum. Thank you for your understanding and support.