Originally Posted by
Maxweii
All in all, simcraft is a shit when it comes to DK's.
Unholy at your level right now should be going sort of like this:
Haste (to whatever point you are comfortable, I like 5k) then Crit/Mastery balanced.
Simcraft will always give you weird stat readings unless you put in a custom AMS soaking value that represents the level you are actually soaking, the baseline in Simcraft is super low. I would give you what I use but I'm not home atm, so I can link it later.
Your gear is pretty heavy on mastery/low on crit though, so I wouldn't worry too much. You tech should drop mastery so that when raid buffed it matches crit, but your gear makes it hard to do so.