Things changed now, we are not in 5.0 anymore, and unholy is an good choice now^^
But im having an problem with reforge, with hit/exp cap>mastery>haste>crit, ive done more dps at dummy than hit/exp cap>haste>crit>mastery.
And i dont see how mastery is worst than crit. And Death Syphon has more damage than Scourge Strike, even in my try with haste>crit>mastery, with high mastery Death Syphon its the best for dps i think.
But im confused, help me a little bit here. Is askmrrobot wrong? Mastery>haste>crit? Or Haste>crit>mastery (second mrrobot words)?
Death Siphon costs a death rune, so you still have to spend 2/6 of your runes no matter what on SS because reaping doesn't convert Unholy runes into death runes. Scourge Strike's mastery scaling is pretty bad to a good portion of it being physical damage. So lets say you have 30% mastery, well your increasing the damage of ~40% of your scourge strike's damage by 30%. Now lets do the math: 0.30x0.40=0.12 or 12% damage increase on scourge strike from 30% mastery which is 18000 Mastery - Base Mastery (30x600, 600 mastery = 1%). On top of that Festering strike, auto attacks, Timmy, and Army dont scale with mastery. Every spell we have can crit.
Haste is just plain too good for Dks
-Faster Rune Regen
-More Autoattacks = More Sudden Doom = Faster/Better Uptime DT and more effective tier 5 talents
-All pets scale with haste aswell
Death Siphon is terrible for dps, death pact costs nothing and heals nearly 70% of your HP.
Unholy Stat weights calculated by the amazing Mendenbarr are below