This will let you handle rogues and paladins 9 Dragons Gold much easier, stacking this with On a Pale Horse (20% talented) and meta gems (+15%) will give you (ex. 8 second stun - 20% = 6.4 - 15% = 5.44 - 15% = 4.26 stun). However death knights already have stun immunity Icebound Fortitude that they can cast if in combat with a heavy stun user, but it doesn't break stun so it must be used offensively and it's on a 1 minute cool down.