When's the last time you saw a warrior/ranger/assassin using a +20% while health below 50% weapon?  Uh, never?  Obviously the reward does not nearly justify the risk...
But what if it were +40% while health is below 50%.  Now the risk/reward factor is more appealing - you might see some interesting team builds arise that attempt to keep their warriors at 0-50% for maximum damage output...
Just a thought... why bother having a useless mod when you can have an interesting one?
                
            Idea for Anet
Frank Dudenstein
Ailee S
                    You can always switch weapon sets.... why else would they be there?
+25% would be ok though...
            +25% would be ok though...
