Drake Hollow

Since my guide got some down votes I decided to redo it and give you more tips since I completed the game two times now and I know better opportunities to go for the achievement.

I didn't use Decoys but they'll help you a ton if you place them correctly. While placing the decoy you'll notice a circle around it. That's the range for effecting the Hollows. If a Hollow will be in this zone they'll start attacking the Decoy so keep that in mind.

A much better place to do this achievement is while getting raid. Save your game and then wait for the raid to happen (or simply use a raid bait).
The Raid has different waves. Only 4-5 Hollows will spawn in one wave at a time but there can be actually more Hollows with the fangs being able to spawn more or the Terminer spawning 1 Stalker and 2 little fries after getting hit multiple times and then shielding himself.

With that being said, don't worry about your camp. Let them destroy a couple of things and focus on the Terminer and Fangs. If the Terminer didnt spawn in a wave just keep killing all those Hollows and hope for the next wave. If he didn't spawn in the whole raid just reload your safe file and try again.

Keep in mind that the Terminer will only spawn after your first encounter and he will spawn more likely in autumn and winter season (sometimes even 2 Terminer in one wave).

I used a two-handed weapon but I don't think that the splash damage scales with the weapon damage.

If you need any help please leave a comment down below.

This one is fairly simple. There are some kind of dog looking enemies, called "fang" and if they howl they'll spawn 2 or 3 small enemies. Wait till there are around 5 enemies, press to jump and then time your right above them and the splash damage should do the rest.

You can try your luck while getting ambushed by a couple of Hollows. There will be about 5-6 Hollows and it should be quiet easy.