After 1 year of TQ neglect (and a new laptop) I've finally reinstalled it and started a Melee Diviner focussing on Vitality Damage.
I must say, it is a blast to play, nearly as much fun as my Warden. I've gotten him through the normal campaign fairly easily. Dying only two times due to sheer carelesness.
However, I'm currently in Epic Greece and I found the undead to be very tough to kill. Not really tough but certainly to tough. Even with Deathchill Aura/Ravages of Time/Necrosis almost maxed.
To investigate I attacked some skeletons with and without Deathchill&co and found out that the damage I do doesn't get any bigger when I use the debuffs.
So how does this work?