Have you accounted for the stalling and running , hiding, tie shenanigans that starts when one side has x3 x4 ..x5?
It will probably skew the numbers abit.
I wish the reward was just dealt whenever the battle ended.
And only the winner gets gold + xp. Loser only gets xp.
Maybe adjust goldwin for cost of gear worn, not in full , but some.
PLayers risking expensive gear gets a larger share of the loot (fixed size)
Scale for battlesize.