Okay, let's go over this one piece at a time.
http://www.wowwiki.com/Critical_strike Agility grants as much crit chance to a warrior as to a death knight. You are welcome to use RAWR, Kahorie's sim or any other theorycrafting tool, the result will be the same; 4p + aldriana's will net the highest potential dps.
Currently on molten you need 1400, Blood Gorged is granting armor "ignore" which is applied separately from ARP, I've been over it already but it seems those posts have been wiped during this herpes ordeal.
What I posted above is not the rotation, but all the abilities you spend runes on over a 20 second period (1 full rotation= 2 rune sets , as after that time your diseases expire and you must re-apply them) as over each 20 second period you will generally cast the same number of these strikes. All that I used it for is to show that with GoDD every 20 seconds you will cast 1 less HS than with GoD.