Not sure if this should be support or a suggestion really, but with the introduction of new melee weapons, I think the first task of the following objective should be changed to “Acquire a Weapon (Slingbow / Mace / Battle-axe / Sword)” instead of “Acquire a Slingbow”…
I achieved the above Wildstock kills using some of the various new melee weapons, as they’re now introduced to the player much earlier than Slingbows are.