Chaotic Dampening, the 10th chaos major trait which reduces recharges on staff skills by 20% and adds 50 toughness while wielding a staff is currently reducing the duration of bleeds from winds of chaos (the number 1 staff skill).
For example, Without the trait, my bleeds lasted 8s. With the trait, my bleeds were reduced to 5 3/4 seconds. This makes for a very significant damage loss.
If for some reason the trait is intended to reduce the bleed`s duration, then it should state so in trait`s description as it is a major drawback the must be weighed against the benefits.