Well, first of all the raid DPS boost of Hemo is so low that I just don't see it as useful utility worth specifically speccing for. That specific spec you have misses out on so much personal DPS that the addition of Hemo in it really doesn't make up for it. The second half of Assassination really doesn't have much synergy with Hemo.
That being said, with Surprise Attacks now also affecting Hemo, a build like this would be decent (let's say for the sake of argument you use a 2.8s mainhand fist weapon, and some sword off-hand):
http://talent.mmo-champion.com/?rogu...01000000000000
Problem is if you think Combat Swords has a lot of filler talents right now, this spec has even more.
Some people were theorycrafting Combat Hemo specs several pages back, but I'm pretty sure it still lagged behind just a generic Combat build by a healthy margin.
EDIT: Fixed link, sorry.