I know most good DPS DoKs here are full sacrifice spec. You might want to enjoy it while it lasts as DPS DoK is probably at its strongest right now where the level is high enough to get all of your needed toys but still low enough that the gap between a true MDPS and a DoK isn't that big(as opposed to T4 where it becomes a gaping chasm). DPS DoK will always be a hybrid, as you will never be able to fill the shoes of a true MDPS. With that said...
One of the other problems with DPS DoK is it's heals fluctuate too much. In tier 1 you will hardly see this happen but if you are making your rounds being unkillable with the whole "if I get low I'll just rend soul back to full, easy!" thing. You'll eventually use a Rend Soul when on a target with an absorb bubble and you'll drop like a sack of potatoes, wondering what just happened. Absorbs will make your lifetaps heal for nothing(excluding the base heal from transfer essence). Additionally, your heals are severley hampered when there is nothing around to hit but tanks. People stacking parry can also cause issues for you aswell.
Theres really no reason to do Torture DoK in a WB. If a warband wanted AoE heal debuffs they would either pick up a Chosen or a Zealot with Chaotic Agitation and Changers touch(AoE channel + 50% heal debuff for 5 sec on crit tactic). Then again, you can do whatever you want pretty much in oRvR zerging and it will work, but the more AoEs you have access to the better, and DoK is very weak in that department.
Torture is not that good of a tree when compared to Sacrifice. Sanguinary Extension is good damage , but Fell Sacrifice is a horrendously bad DoT. Warding Strike isn't amazing but it definitely helps. Devour Essence can be fantastic when used correctly, saved many people with it as much as I have Rend Soul. I've never gone far enough up Torture tree to get WA but I've heard its nice. When compared to Pillage Essence the difference in damage isn't that great, also is usable to full effect when target isn't under 50% hp and has a little extra utility. CoK is one of the best tactics we have access to but its unfortunate that its locked away so far up the Torture tree. AoE detaunt is nice aswell if you don't have access to a tank(like if you're pugging in an sc) but otherwise isn't needed and DoK is very hungry for tactic slots.
I haven't done DPS since the level cap was 32 and I don't really know what I would run now, but Divine Fury and Murderous intent are mandatory. Also if you're out in the lakes soloing swapping to celerity to spam FoK to chase someone down is a good idea.
Cookie cutter all rounder probably looks like this:
http://waronlinebuilder.org/#career=dok ... 9:;0:0:0:0:
Group support
http://waronlinebuilder.org/#career=dok ... 6:;0:0:0:0: