They are more weak to dark.

The fact that ashen warrior axe and halberd variations do not drop the actual weapons is just baffling

I can’t believe that these enemies only drop their unique sword, not the battle axe or halberd. It even says that their weapons were forged by an artisan, but they drop normal weapons, that’s just lazy design.

Crystal Soul Spear doesn't seem to be hardly putting a dent in these on regular NG (ascetic Freja for the spell). Using a +10 magic infused Witch Tree Branch and 50 Int. I'm able to down Alonne Knight Captains with a single spear. Hexes might be the go-to magic here according to some of the comments below.

Man as much as the DLC locations are the best in the game, the enemies sure suck enough to make up for it

Well it seems they're very weak to lightning from what I see while I'm fighting them.

Alluring Skulls or Yearn will set these assh*les in their place. Do not explore Brume Tower or Iron Passage without these.

Why are they vomiting every 5 seconds ?

they take almost no damage from my dark ball spell

Aren't they weak to strike?