How does battle kills work? I've got 10 but have no idea how I got them. I once tried increasing my stamina so that I have a high percentage on someone that had very low health but that didn't cause a battle kill.
you need to raise both your attack and health if you want a higher chance to get a kill.also increasing your defense and stam could help as well.
just attack and when rival is in hospital do axe slap and if your health is big than axe slap gets better so more chance to kill ... also if u see your rival on battle page and after some attacks your rival is one attack away to go to hospital best is get boost from friends and also add 10-stamina boost and most case will kill but if not than axe slap kill will be 99%