An ARP DK should always fall behind a STR FDK in an encounter where's too much movement, when it comes to a blizzlike environment.
Although this realm is not even close to blizzlike and most of you don't even realise how bugged Scourge Strike is for an instance, and the sad part is that they will absolutely never find a solution to it because the math behind it was too complicated.
The Shadow strike should hit like if the initial attack ignored armor, there're much more rules to it and thus why most of what you think is normal isn't.
Unholy should be topping the charts in 3.3.5 and is the strongest spec DKs had during 3.3.5, since the beginning of this expansion Unholy was and still is the most valuable spec for any raid.
It provides great DPS with great utilities that his counterparts cann't supply.
Unholy ruled with an iron fist until brief moments where Blood climbed up the ladder and Frost 2h for a little while but came ICC and Unholy was top again.
Blizzard had to ship in MAJOR buffs for Frost since it was garbage, they buffed Nerves of Cold Steel and made Endless Winter give 4% Strength which it didn't before.
Hence why in most private servers (depends on bugs) Frost is the most powerful spec, since you don't have to know your **** to do great DPS.
I've seen a lot of FDKs do decent DPS that any raid leader will appreciate without even executing a 3rd Obliterate with Death Runes.
This realm has many problems and Frost Strike is just an example of it, it was too powerful in any 3.3.5 a couple of years ago and they nerfed the **** out of it, and as far as I'm seeing in this forums and in the bugtracker they nerfed it too much. To a point where Ebon Plaguebringer doesn't increase it's damage, and it should.
And for the discussion at hand, 3/3 points in Subversion mate is an overkill, BCB provides superior DPS. Not to mention that KM is also superior than BI.
With all due respect, up until now most people here who have addressed me or simply provided a statement made sense, mate most of what you say is completely beyond me. No idea where you get your facts from and your talents makes my eye twitch.