Strength of Bluestone vs. its cost It should be pretty clear by this point that Bluestone Pendant's current iteration has proven far more potent than desired. I believe this is because it adds raw flat damage to abilities for no cost. Its damage comes out within the span of two skills, and those two skills can be used very quickly. This powerful effect should be slowed down by having extra requirements for activation, such as having the user land a certain number of basic attacks much like the magical counterpart Soul Stone and then consuming those stacks when ready. As a suggestion, the effect can require 4 stacks, but store a total of 8 so as to preserve its current power while slowing down the rate at which it can be used.

The alternative to this is to be boring and reduce some numbers. Perhaps 16 physical damage per application split into 8 points per second. This solution could be used whilst the former is prepared at a later date, much like how Nox's initial rework was handled.