Fine, Bloodwhetting is too OP

[CKNovel]

DPS lack adequate sustain to singularly keep themselves alive

They can sustain themselves.
Dark Knight & 3 DPS run exists, here's one where the Dark Knight doesn't even cast Dark Missionary once and keep Oblation/TBN to themselves. Here's another one for the second Expert dungeon and finally Alexandria where the DRK press slightly more buttons.

And no, before you point out the Pictomancer, Star Prism didn't played a major role, I feel like this group was trying to see the limit of DPS self survival while using the least amount of defensives.