Hey, I just recently strted playing my DK again and I am starting to raid and just wondering how my spec is and what I could do (if needed) to improve my threat or any other general spec changes. Thanks!
I would strongly advise blood gorged 5/5. The threat increase comes not only in the form of increased damage (10%) but also in armor pen. And, you will be above 75% for the majority of most fights. Its a must have. I would imagine it will fix all of your threat problems.
Also, I would recommend using macroing rune strike to all abilities (HS, DS, IT, PS) you can put it on everything if you want, but it will frees you up to concentrate on the rest of your rotation and positioning/add management. There are macros all over the site for this.