According to the tooltip, it should take 50% of the damage you, the caster, dealt to the cursed target and distribute it to enemies around the primary target in a 30' radius. What it actually does is it distributes 100%+ the damage anyone in you party dealt to the cursed target, resulting in huge amount damage being dealt by a single cast of TT. TT + Op force kills an entire room of adds in CN in a couple of seconds.
Below is a screenshot of an ACT log. This is a CN run from last night. My SW is a 14.3k gimp, temptation speced.
ACT screenshot
As you can clearly see my biggest hit was a 100k TT, while my second biggest hit is a 42k fiery bolt. Party-wide max hit was 112k (GWF IBS).
Please fix this, make it work as it is described in the tooltip, then allow TT hits to crit and take armor penetration into consideration, since it doesn't work now. As it is now, it's worse than mod 2 Deep Gash, since if you optimize your build for daily uptime, you can achieve 70%+ damage from TT. I'd rather have it fixed now, along with every other SW bug, than have it nerfed into uselessness by adding a target cap to it in mod 5.
Comments
No, it's far from their only decent source of damage. I suggest you learn class mechanics now, so that when it's fixed, you're not rendered helpless.
Don't make the mistake of comparing them to a Thaum CW, which is insanely broken right now, and does far more damage than a Deep Gash bugged GWF could ever dream of, if played properly. It's actually worse than when you could keep stacking High Vizier, back before mod 1. Compare your Warlock to all other classes, and MoF CWs for a sensible baseline. If you are anywhere near a well-played and well-geared CW right now, then there's something very wrong indeed.