I think for your case, the bunny might be gone forever. How to kill the bunny at lvl 15? Pretty easy if you know how to use the terrain. I kill him along the river near the enchanter smith in broken valley.
1. There are few rabbits wandering by the river side. Kill it and the bugger appear.
2. Back leap into the river, and the bugger will like stuck by the river side, as it cant get into the river.
3. Time the range of the fire ring that creates by firewall. If lucky enough, 1 firewall will burn that bugger out with the help of some arrow shooting as well, but not much damage done to the killer bunny though
My arrow only deal bout 10-20 damage to killer bunny at lvl 15. It will take ages before I can shoot him down. And as you know it can regen whenever he decide to turn back instead of stuck at 1 location. That basically how the trick is. And its one of the few cases which I really need firewall on my warrior.
PS: After patched the game to 1.03, I notice mob wont regen anymore after running back to their dedicated location.
