I just tested this with a duelist and a warlock.
Duelist without ph: 5.2s in between attack animation. 4.6s with ph.
Warlock: 6.1s without 5.15s with.
Obviously there’s going to be some human error in there since I can’t tell the exact start up of every animation, but it does have an effect. It might not mean much but that amount of time is the difference between life and death (regen ticks, finishing heal animations, endurance recovery, etc.)