I'm sure most people reading this know about both of these items and their uses so I'll spare you that part.
Anyway, by using the racer you can see mobs farther out than you can from your character's position. (i.e. see mobs past borders you can't cross) When you're at max racer range use the arrows while still in control of the racer and the arrow will fire immediately, making it so you can pull mobs from VERY far away, much farther than you can with absolute max unit draw distance.
I'm sure you folks can get where I'm going with this.
