I use battle mode on classes that only need one bar not because I need more spots, obviously. I use it for efficiency.
I have all my keys centralized on the left side of the keyboard if I can.
Q W E R
A S D F
Z X C V
Makes it easier in woe pvp and pvm when you don't have to reach so far in a tight situation. Using F12 to switch to a new bar then going back left to switch new gear then going back right and pressing f12 two more times is just too slow.
