Having Trouble With "War is Hell" Expert Challenge

[Tin Can]

I am not really sure on how exactly I should scale for the last few rings. So far the best runs I have gotten use primordium with a hellhorned unit using multistrike. Is there any advice on specific builds I should try for this?

Edit: Thank you all for the advice! I will try using these strategies in this challenge.

[Kaerius]

Primordium with Awoken for sweep and additional buffs.

[BeastofBones]

Yup, Kaerius suggestion is a good one. It's pretty much the default option, find Sweeper, win game. Look to do the standard Ember Drain package (Perils on Holdover, Void binding, Furnace tap) paired with Superfood Primordium.

If you want it to work in Hellhorned, you probably want Furnace tap + Superfood Primordium. This will let you continuously stack multistrike on your DPS, which will provide the necessary scaling to blow out the waves. Just make sure you have a way to safely deploy onto your intended floor without your DPS or Primordium immediately dying to Divinity at high shards.

A lot of classes can work in the challenge if you try though. If you went Melting/Umbra for example, a well played Dark Calling Rector tends to wreck this challenge. If you see Crushing Demise, it guarantees minibosses aren't a problem, and duped Enforcer infusion with quick/Multistrike provides ample DPS for waves and ending the boss. Also has a strong early game, as starting Dregs benefit from the challenge bonus and do a great job of contesting waves. Shadesplitter is better than Plink for the same reason. Here's an example run ending at 415 shards, Pyre only got touched on Ring 4.

monstertrain://runresult/50f8def3-ac20-4703-9d4a-974ad3bd5aea

Edit: Definitely watch Gabriot's video linked below if you want to pursue the Sweeper strat, as it's a perfect example of how to run it. In fact, if you need examples of the other Expert challenges, there should be a video for each one on Gabriot's channel. Nate and Narninian should also have videos for these as well if you want to compare strategies.

[Gabriot]

Kaerius and Wraith have you covered already, but I figured I'd throw a video your way if you wanted to see the strategy in action: https://www.youtube.com/watch?v=ayHvgjMSR84

[Davision]

Also make sure you have a good amount of damage buffs for your primordium since the Divinity mini bosses at max difficulty have ca 1000 health which is massive. Furthermore important is that Divinity himself makes a lot of damage so you most likely can only keep one level of units alive.

I had a lot of damage shield but barely any spells to buff the damage of my sweep unit through the promordium so I failed with this overall strategy using Awoken as the second clan.