The Biting Blades ability disappears if it touches an impassable object or any terrain that isn’t level.(Which apparently is 90% of the expansion) For being on a level 90 component with a 2.5 second cooldown, the ability is really ineffective and lackluster.
I suggest making it persistent so that it passes through objects, perhaps increasing the cooldown.
When you say “lot of damage” the question is “as compared to what else you can cast during that time” and the answer is nearly everything if you have any skill trained up at level 90. That’s the problem with active component skills, if they’re too good they replace mastery skills but too weak and they’re never worth casting. We’re currently in the latter zone I feel like. I’d much rather the components modify the active skills you already use versus adding another button I have to press that does less damage than a skill I already have.