Well, I'm going to need to update this to account for Khorne: Daemonkin, since there's a pretty large overlap on the Venn diagram here--and I'd go so far as to say that it's made Khorne a semi-competitive, actually fun army to play!
(almost mis-typed "a fun army to lay"--nope, it's not Slaaneshi...)
Also a note on FAQ changes: Cypher can no longer join a squad of non-infiltrators, RAW, so his usefulness has dropped, unless you're taking him with his already-infiltrating 3 squads of Chosen formation that lets you have the "old-fashioned" Chosen of prior codexes.
Also going to do my best to link to the series of tacticas that several forumites are sprinting to post more of, and going to update my old Be'lakor tactica (which was posted on another thread, not ever here) with new, fresh photos.
What sphinx of plascrete and adamantium bashed open their skulls and ate up their brains and imagination? Imperator! Imperator!