although i'm playing a different talent spec there are some items I can't agree on.
First of you are using the 2 JC items. Imho ArP is pretty useless for Frost DKs pre-ICC in general and it's not very useful if you are not stacking it.
The badge neck is far superior in my opinion and for the ring you should absolutely go for the Gundrak HC one. In your setup you are preferring ArP over Expertise which is kinda weird.
For the cloak Shroud of Reverberation from HoL HC is the better option because of Expertise
Because of my different spec I'll prefer plate items so the plate emblem belt would be the better option.
Mirror of truth is a total shitty trinket with a proc rate of ~10%, getting Meteorite Whetstone is better
The last thing that got me wondering is why you didn't choose the T7 pieces for emblems? You can get the chest and the gloves which not only offer great stats but also the 2pc bonus. I know they aren't yet released, but they will be today. I assume your list was meant to stay so I'd definitely add them to the list.
In general the usage of old tools like rawr is kinda meh. DK guides and stat priority lists suffer from the many talent and glyph changes between patches 3.0 and 3.3.5. We are playing 3.3.5 content but the gear and content we are playing is T7. So if you find a great guide like the old Elitistjerks ones you should always have to keep this in mind.
Same goes with talents. You wrote you are using 0/53/18 probably with BcB which is supposed to be the top dps spec according to old guides. But these guides assume you are raiding T10 and have T10 itemization. I'm using 15/56/0 which shouldn't be ahead of you spec but still is. In the last years I raided T7-T9 content in 10man and 25man on a different private server (starting with a D) and all Frost DKs use this spec. The reason behind it is generating a max amount of Runicpower for Frost Strikes and getting the best out of Bladed Armor.
Well...just my 2 copper...