@Janus

Doh!
If I only knew... can't help feeling a bit stupid now, but you just made my day!
Thanks! Also for the really fast response =D

Off to the presicely bigger battles (if my system can handle it at least) ^^

A suggestion for manual input.

While the slider is visually appealing would it be possible to get a manual input? Maybe as in click on the current battle size field and insert desired value; hit save&exit and go.

I found it really hard to adjust the slider with prescision, may just be because of the sensitivity of my mouse and the slider combined. Luckily you won't change your battle size that often, but fiddling with a slider for 5 mins to set a specific amount on a very large scale, made me come here and suggest a workaround.
(I did notice the in-/decrements somewhat go by five but it was very hard to keep it locked on the 0/5 values.)