I knew this was coming. Bravo sir!
While I do recognize that a CC Nats is on the list to upgrade at some point, I don't think now is the time. They're too expensive, and while that ring you listed would provide a 7k dps increase ... it's not worth at the expense of multiple other upgrades.
i would first go for a pair of trifecta gloves, you can usually find good ones for anywhere between 50m and 100m wich would leave you with 300M or more to go witching hour hunting. The truth is, after the witching chances are you'll be mostly out of gold, the good ones are extremely costy. At that point, you'll be left with 3 inna pieces. IMO you might as well drop down to two and pursue the blackthorn 2-piece bonus (in your case i'd say chest + amulet) wich you should be able to purchase with about 50M-100M (depends on how good the amulet is). Not only would that bring your eHP (in your case mostly your AR since your Inna's chest is pretty much perfect otherwise) way up, it'd also give you a respectable amount of LoH.
I generally don't think Trifecta gloves are worth it, but I can look into it I guess. Usually you can make up most of that CD with high CC/AS rolls and not have to pay through the nose.
I have zero interest in a Blackthorne amulet, though I do realize that my chest could be upgraded if I break 4 piece Inna's.
If LS gear swap still works then ... I dunno. You're only swapping one weapon which wouldn't be *too* bad to do if SW should fall. You do bring up a good point though. I'll keep that in mind.
As far as goals go ... I feel like I should get rid of OwE, but there's no point until they fix the passives, and I'm not even sure all my gold would be enough to make that transition. While I guess that dueling will be a fun break here and there, until they make it have rewards I'm not that interested in spending a ton of money. Not really interested in S&B outside of it being practical in PvP (I have a cheap-o shield already and WH would be great for S&B).
I don't really have a concrete goal right now outside of just upgrading my gear. On 1.06 I can solo MP10 ubers, but that's using my half-assed snapshot technique. I'd like to be able to solo MP10 ubers in 1.07, and I'm not sure that I would be able to do that with my current gear. I actually tried to do Azmo on MP7 on the PTR and couldn't kill him (DPS check, while standing in everything). So that was monumentally disheartening.
edit: I also grabbed this on the AH last night, partially because it's got dual sustain (though I am not sure how the 500 LoH weighs vs the loss of .5% LS) and partially because it was pretty under-priced (I thought). http://i.imgur.com/yFBfy3L.png