Regards the hunting challenges, instead of copying what other have said, just have a look
at the Goty ed guide.
Only one gave me issues was:
Hunting Challenge 9: Kill a Ghul MatronI had waited around at night, gone to Barrows of Udun tower, as some videos had show, killed ghuls & the last 2 would get an icon alarm above heads to get backup.
Unfortunately they would not often return, or not bring a Ghul Matron (or the 1 time I got one I died to it, as I didn't have any bow energy.
So, we shall do a side mission & use an ability to instaKill it.
1st map = Udun > Udun Crossing Forge Tower (near bottom left of map, next to WestGarrison/Sea of Numen fast travel) > silver mission icon to south - Nameless Things (Sword Legend mission).
-Kill 3 camps of Ghuls in a cave > Ghul Matron appears > instaKill with Lethal Shadows trike - LT+X (need to unlock & buy with Ability points on 3rd row) just takes too long with headshots or Finishers.