The latest patch introduced a new item which when used provides a damage boost of over 25%+. This basically nullifies any ranking prior due to the absurd amount of damage it gives you.
Don’t mind the removal of this since it was annoying to execute and pretty widespread.
However, I don’t think you can just invalidate people who used it. All physical classes in the raid benefit from the armor reduction of the debuff, which is presumably 25% due to 5% per application of the debuff stacking up to 5 times. Buff was shared for all players (which is why everyone refreshed a single instance of the debuff on the boss) so there’s no reason to think that this gain was only for the person applying the debuff.