|I did think about it...|
... but in the end, this Spirit Beast survives. At least for now. First pass of the day in the Basin and he's in the last spawn spot I check. I work on the theory that the next time I find him I won't have a fight, but who knows. Needless to say, I have infinite patience, and I KNOW he's gonna respawn eventually.
I named him Lucky, because he is.