From some of the theorycrafting websites the stat priority changes slightly depending which one you are looking at and i just wanted to get some thoguhts on which one is actually the best to choose.
Icy Veins: Bonus Armor > Mastery > Multistrike > Versatility > Haste > Critical Strike.
Noxxic: Bonus Armor > Multistrike >= Haste > Versatility > Mastery >= Critical strike
My opinion: Bonus Armor > Multistrike >= Mastery > Versatility > Haste > Critical strike
The reason for having multistrike below BA (Bonus armor) is because Due to the change in death strike's heal it does not change dependant on damage taken in x period of time. meaning that it only gives a static heal. (Excluding Resolve). by tkaing multistrike this will allow you to be able to gain extra healing on average with death Strike's which counters all damage types (Excluding healing reduction abilities).
The reason for not taking mastery is because it gives a physical damage absorb %. This admitibly is very nice allowing the dk to minimise the spike damage he is receiving from incoming attacks BUT it is only relevent to physical damage.
In return i feel that having a higher chance for multiple heals from a ms proc on DS over a full boss fight would be more beneficial then having mastery as a top prio stat. But this does mean that there is a little more spike damage compared to a full mastery DK.. but if the DS are used at the right time and the healers are aware of this then the outcome should still be more beneficial.
Currently i am tanking with a bear who has 10ilvl's on me (540odd - 550odd) According to recount during the average boss fight i am still within 2% of damage taken but my self healing with this stat priority is 3/4 x higher (I know i am a dk).. i.e Bear = 3k Hps DK = 9 to 15k hps)
Even though i think priotising ms over mastery i still believe mastery is very important and thats why i feel it isn't far behind ms in importance.
PS sorry if i haven't explained my point of view very well..
If you have any suggestions why my theory is wrong then please let me know and i will change my personal stat priorty. thanks people
Dec 20, 2019 Best Blood Death Knights rankings (PvE) Last Database Update: 20 Dec 2019 - Players with 1/8 or more bosses killed in Mythic mode - Add a character. Rank Class Spec. Icy veins guide: unholy - death strike not mentioned at all I'm getting back into DK, and I've been reading the UH guide on icy veins. There seems to be no mention of death strike at all. Well to be honest, i have read up on homepages like tankspot, elitistjerks, and here on icy veins, but they are still complaining about me taking too much damage, i am now blaming it on gear, as i dunno what i can do different myself. I will try and update this post as i (hopefully) gear up more.


These rankings are created using SimulationCraft, a program that is highly tested and trusted for simulating in-game encounters with characters.
We use SimulationCraft because simulators permit a high degree of control by allowing us to use specific talents, rotations, gear, possible boss mechanics, etc. to arrive at repeatable results that can be compared across specs and time. Also, simulators allow us to average out results from thousands of fights to get a feel for how a spec performs all of the time and not in one amazing fight.
If you are curious to learn about the simulation fight encounters of Max and Real, we recommend to read our past articles that describe them in Part I and Part II.
The damage meters for my boss fights look very different than these rankings. Why?
There are any number of reasons why in-game results will differ from simulated (or log based) results. A few common differences include the following.

How do these rankings compare to other sources that use raid logs to show spec comparisons?
Raid log sites offer a perspective on how some of top players are performing with each spec. These rankings can be helpful to understand how specs are faring in the current raid tier and often reveal unexpected synergies between specific specs and boss encounters. However, log based sites are subject to their own data problems including players who artificially boost their DPS by employing technical or social exploits, changes in popularity of specs, uneven sample sizes, and generally unrepeatable or uncontrolled results.
While simulators allow us to get a feel for how a spec performs all of the time through averaging out thousands of fight results, it is important to note that simulators are generally weak when modeling specific fights in a raid tier, and additionally they rely on data that is as good as the theorycrafting community is able to produce.
Overall, no single DPS ranking is perfect and they should all be considered when evaluating specs. Simulators and log based solutions both offer value to the WoW community.