180k soul reaper is ok, I think. I know I've hit some alot higher then 180k....
Necros, however, are absurd here...and this is coming from someone actively playing an UH dk...necrotics are doing 20x more absorb then retail.
My rotation for killing someone lesser geared is this: Outbreak,necro, necro, necro, necro, soul reaper=dead
In full burst, I'm able to put up a 700k absorb on my target, wich is almost impossible to outheal by the time SR ends the job.
I'm all up for nerfing Necrotic Strike as it ruins the fun for everyone, including DKs.