The thing that really increased my dps was popping zealotry and avenging wrath at the same time. It used to be advisable to pop them separately, but that has changed, and has given me a HUGE dps increase. Try it out if you aren't already.
I agree with your statement Arlas unless you have access too Apparatus of Khaz'goroth
This can change your priority of stats up quite a bit, because a full powered use of the AoK would give you an added 2500 mastery. Which puts your mastery at giving you 100% added holy damage to CS, TV, and DS. I've found that popping my wings and GoAK then using a priority based roatation until i get 5 stacks of Titanic Power, and THEN using my zealotry w/ a golemblood/BL/timewarp/heroism increases my dps more than just blowing avenging wrath and zealotry at once. Also doing this seems to always set up my CD timers in perfect unison.
On my guilds numerous Rag attempts i've tried both methods to see what was more effective. Popping wings and zeal at the same time can ut me anywhere from 32k to 36k burst damage, but after im done i drop to around 18kish. If i use my tweaked priority rotation w/ the AoK in account, I can burst around 28 to 32k but then even out at around 22 to 23k. This method of mine has only been tested on Rag up to his 53% mark, but nonetheless it seems more effective than blowing everything you have at the start.
Also, popping GoAK with Avenging Wrath helps build up the 20% str increase you get from stacks of the GoAK. That way when you pop Zeal, you have an added 20% increase, your 2500 mastery increase from AoK and whatever other procs/trinkets/potions you might have.
I'll say its again like i said it before. Ret isn't a broken class. Our dps is ranked above SMF Warriors and only 600 overall dps below TG warriors for FL content. Besides. Sulfuras, The Extinguished Hand
was made for ret pallys.