Not sure if he has a recent full guide but the only pvp destro lock around that i know of is Cobrak on youtube/twich. He probably has a backlog guide from early in WoD, tbh destro hasn't changed it all.
I don't understand how you mean that they "contradict" each other? No matter what you look up there's only a single line of viable talents for locks, especially destro locks? Do you want to know talents? Glyphs? Rotation? Like what are you asking for?