Things could be better, but not being able to find a corrupted hyena? Just farm the hyena spawns, 3-4th respawn should have a corrupted hyena in it.
Even without the challenges, a wine cellar run gives you 1 level at least. I’m playing Siptah and I find clearing Vaults more fun and a better reward for my time.I’m already lvl 16 while playing maybe 2-3 hours now and then.