It is widely said that ARP is a very low stat choice for Unholy dk's. I am hit capped regardless of which trinkets i use. Greatness card is a must, and since i don't have death verdict yet i have a few options.
Mirrior of Truth = Crit + Chance for 1000ap 10 seconds
Banner = 84 arp + Chance of 1000ap 10 seconds
Grim Toll = 83 hit + chance of 612 arp 10 seconds
Testing with Mirrior on Heroic Test dummy (confirmed no misses) Horn only buff - 4040dps over 3 min.
Testing with Banner on Heroic Test dummy (confirmed no misses) Horn only buff - 4010dps over 3 min.
Testing with GrimToll on Heroic Test dummy (confirmed no misses) Horn only buff - 4180dps over 3 min.
Since i can confirm that i don't miss anyway the extra hit isn't the benefit. Its the Proc of 612 ARP rather than 1000AP. The extra hit is a wasted stat, but it appears to be better for dps than extra crit \ ap which is the other choice.
This basically means the theory is wrong. Sure arp doesn't work as good for unholy as it does for blood, but it works better than the other trinket options until deaths verdict. This is only true for single target fights I am assuming. Arp will effect your main target only, where as the crit bonus from Mirror will effect the all the diseases on every mob in range of you when you spread. So for Anub or faction champs, Mirror would be better (not confirmed). Fights with single boss or single focus such as Northrend beasts grim toll would be better.
Intelligent input would be appreciated.
Here is my armory. http://www.wowarmory.com/character-s...&n=Wraithfiend