Watch me suffer through Darksider 3's The Crucible on Apocalyptic difficulty (default combat mode).
Needless to say, this was (approximately) my 94835734958745th attempt after having beat it on Challenging the day before. Also, funnily enough, this was the first time I used an Undying Shard and ironically I didn't actually need it.
This video shows you how to unlock all the achievements in The Crucible DLC, but keep in mind you can do it on any difficulty of your choice.
Waves 1-25 - 0:00:00
Gor ("Impressive!") - 0:15:30
Waves 26-50 - 0:16:35
Sherhaal ("Incredible!") - 0:34:00
Waves 51-75 - 0:35:30
Rastion ("Amazing!") - 0:52:25
Waves 76-100 - 0:54:20
Urul ("Apocalyptic!") - 1:16:45
Wicked K (Quite Proper) - 1:19:45
Likes, shares and comments are very welcome. I would make this a guide, but my best tip is to get good if you are attempting it on Apocalyptic difficulty. Otherwise, simply drop the difficulty until you can manage it. Use Undying Shard for peace of mind and for the random deaths out of your control.