Quote Originally Posted by Psyren View Post
It's worth pointing out she's using the adamantine dagger effectively as a piton. That lowers the DC considerably.
A climber's kit gives only +2 bonus. It might seem strange that equipment specifically designed for climbing barely actually helps you, but remember that D&D is permanently stuck in fantasy mediaeval technology, so they don't have modern lightweight ropes made of synthetic textiles. As for the adamantine dagger, it's probably not magical, so I don't think it will give more of a bonus than a dedicated climber's kit.