Maybe some of you have noticed this bug but I'm gonna share this with all of you. There is a big bad bug in the game that let you shoot lots of arrows; for example 30 shots without refilling! Okay now how should you do this:

1. shoot your arrows but don't stop when it reaches 0.
   
2. if you keep shooting, when your arrows reach zero, you still will be able to shoot arrows even faster than before!!

The important part is when it's near zero, you must click faster; I mean don't stop clicking before it reaches and after zero! when it reaches 0, you'll see that you are still shooting.
So after this be careful not to place Soft headed uruks as you warchief or overlord because with this feature you'll be screwed!

P.S : it doesn't work in blade of Galadriel expansion!