Killars seems to be killing it (heh) with Assassination so far in Tomb:
https://www.warcraftlogs.com/reports...tical&fight=14. Pretty consistently beating his Sub buddy.
He's also wearing boots, which surprises me.
I looked through his logs and tried to find some "secret", and all I saw is that he uses TB, KB, Vendetta off CD. Holds Vanish for a burst period.
Hopefully there's more to it, cause if not, what a fucking mongoloid spec they've turned this into.
You could literally macro TB, KB, and Vendetta into Mutilate and push 1 button most of the fight.