At the very least, Darius can be a K-Scope using Farming zerker. That's still better than anyone else in D tier.
I mean, he's the blandest one, but it's still better than whatever bullshit the rest of the tier does.
Darius to bottom of C tier. He's the worst of the farming berserkers, but that's still better than the rest of D tier since he's pretty straightforward.