Rebound doesn’t reduce the cooldown of shouts (at least not the utility ones). Reduces cooldowns of cantrips though. Go figure.
Also, it takes awefully long for you to get the buff after using the skill, so it’s entirely possible you’ll use an instant skill before you get the rebound 25% CDR buff
Rebound should really be instant at least. Or completely reworked, doesn’t really fit Tempest in any way.
It does work for me (Wash the Pain Away, Flash-Freeze, Shock-and-Aftershock), you just have to wait half an hour before the buff actually activates. But then it does not work with Cyclone.
Edit: When I removed the trait Imbued Melodies, the recharge on the warhorn skills gets reduced correctly.
Edit 2: Similarly the trait Tempestuous Aria is the culprit for shouts not recharging more quickly. If you remove that trait, it should work. I wrote a bug-report for both of these.
