With the debuff CD fix (in Accessory Quests), ATK debuff nerf, and Vine (really important to a lot of builds right now), offensive builds have overtaken endurance builds in terms of relative potency and ease of use in solo content. The ATK debuff cap severely nerfed pure Endurance builds. This lead will only grow as the +100% eidolons are released and become available as Friend eidolons. Endurance builds won't regain this lost ground until the introduction of weapons with the Ascension skill, which massively increases healing.