Updated the OP with some of the templates that have been posted since my last visit.
A few remarks about them
- replacing agi with arpen gems resulted in a net loss of dps when I tried it.
- Brann's Signet Ring is not yet in the spreadsheet so I used the next best included instead.
- weekenders SV template surpassed sihyunies by about 4 dps. I couldn´t get anywhere close to his numbers though. Feel free to point me at any mistakes that may have resulted in those lower numbers.

Have you considered that it may prove unproductive to allow all kinds of hard mode loot? Items with low availability to the general raiding populace, or at least the ones that frequent these boards, may eventually make this effort useless. It might be an idea to split the spreadsheet into two, so that one spreadsheet allows all normal Ulduar 25 loot and all, including hard mode, Ulduar 10 man loot. Ulduar 10 man hard mode seems fairly doable, at least compared to Ulduar 25 hard mode. Just have a feeling that many people will not be able to get their hands on the Ulduar 25 hard mode loot and thus not be able to utilize the spreadsheet. In either case, it is quite certain that while you can relatively quickly get your hands on all normal mode Ulduar 25 loot, getting your hands on the hard mode loot will happen slowly indeed and even using Algalon loot at this current stage seems near fictional.

In Naxx 25 the spreadsheet was great, everyone had access to all the loot used but I have a feeling that loot access is going to be split into two tiers now - those that can access hard mode loot and those that can not. Eventually, everyone will be able to but at least for some time to come I have a feeling there's going to be a definite split between guilds.

I would like to second that. I am one of those hunters who wont be having access to hard mode in any foreseeable time, and so I would love to know what accessable gear would be best for me as a survival hunter.

Correct me if i'm wrong but this is the "Best possible DPS" thread right? I'd like to see the theoretical maximum and set that as my goal, if you want a more accessible list, then use the spreadsheet yourself for items you personally are likely to get.

Correct, this isn't the "Best possible DPS with reasonably accessible gear" - however I'm sure Midnight didn't consider all the implications of what the initial goal statement of the thread would mean for all eternity. Don't you think it'd be reasonable to have this discussion instead of trying to assume ownership of the thread on behalf of the community? You could be spot on with regards to what the thread is for, but I think it is a valid point to bring up and it'd probably be better if we heard the community on this rather than just you.

My observation is simply that by allowing all the kinds of hard mode loot that Ulduar has to offer, the usefulness for the broader public of the spreadsheet could be diminished significantly. The task of choosing the optimal gear-set is almost equally complex at all item levels and as such it is not reasonable to simply dismiss people without access to the most desirable and hardest to get gear, by simply saying "use the spreadsheet yourself for items you personally are likely to get". People that can not access the best of the best in the near future will have very little use for a spreadsheet that is the equivalent of "What those 24/7 (literally) raiding hunters should be wearing". Yes, you may find what the theoretical maximum but ultimately it isn't a very useful piece of knowledge unless you are within reach of it.

I'm not saying it's impossible to keep the little niche the spreadsheet would be burrowing itself into, just that for the broader public it's not very useful. Personally I've been following the thread with interest, but lately it has become more and more esoteric. Try not to find offense in the attitude of my response, I was just slightly peeved by the assumed unreasonable assertive nature of your reply.

6/14/51 is the best Specc in Spreadsheet. So why does nobody skill like that?

The value of individual talents can fluctuate with gear level, talents can scale based upon different stats such as AP/Crit/ArP/Haste. Because of this it is possible that at extreme gear levels, such as here, that the best spec for that set of gear will differ from what most people have now.

Try weekender's setup with different latency. 0.2 -> 0.1 sec will give about 2~300 dps increase. I only have open office at home, so can't test it.

People use 0/15/56 alot because of what was said above, taking hunting party, but also taking aimed since alot of the encounters require you to move. Trash requires some cc as well too so its nice to aimed instead of multi there(good for MD pulling as well). As the fights get easier and people are more geared im sure they will be shorter and less taxing on mana.

Aimed shot is essential for Ulduar. Most of the encounters require either a significant amount of movement and/or cc'd mobs. Having that extra shot while moving, as well as a shot in rotation that won't pop cc'd mobs is essential to raid dps.

i personally have both specs as dual spec, my decision which one to use is based on most of the criteria described above.

biggest criteria is mana and you will go oom very fast if you dps mobs without JoW on them, but also if those fights have a lot of movement you can easily pop viper while moving and no instant shot is up. then before shotting ms and es again, just go to dragonhawk. also ms isnt a big isssue with movement fights, yes it got a short cast time, but i ll just say a skilled player can stand still for 0.5 secs, pop the shot and move on. i estimate the mana consumption with this spec to be a little more than double what you have with the 0/15/56, and thats not cos of ms, but rather due to missing TotH.

there are very little fights that require cc imo, at least boss fights, one of them is thorim in the tunnel, ms is a killer there.
an really think of any else, razorscale has a lot of adds and if you dps right you will not pull aggro on any of them.

it can be a massive dps boost on fights where you dps multiple mobs, e.g mimiron, last phase (i hope i dont spoil stuff here for ppl) but basically you dps all 3 parts with your ms every time you use it, great dps boost. also freya, great dps boost. ofc only if you can manage to keep your mana at a decent level, which quite often requires aspect weaving.

btw, you have sniper training with all specs, so even if it is a movement fight you wanna try to plan your movement that you get 6 secs of standing still at some place to get sniper training back up...