Hi. First time posting.
Just wanted to contribute with my ideas as Dark knight too.
My main problem is with Living dead, which is a very dangerous skill that can make the healers think "I made it", stop healing when you get over half, and then see you die to nothing.
I think that would be partially solved by increasing the timer to 12s and giving every skill the Dark arts effect under those 12 seconds, which would effectively increase the self heal and the solo usability, along with some DPS problems.
Also, changing the players name in the party screen to pitch black with a grey or white HP bar, would effectively tell the healers that Walking dead is still under effect.