About Knight/Warrior
Can you make United Efforts ( ID : 499930 ) a permament aura buff or 900 seconds buff ?
And Quick Reflexes ( ID: 490064 ) could be a 900 second buff also.
Maybe you should also reduce cooldown of Whirwind ( ID : 492356 )
This class has very high aggro but its aoe skills have 6 second cooldown. It is too much i think