I picked this up because there's potential for it to be BIS for moonkins and what's dkp for if not to spend?
So far my impression has been very favorable - on most fights the valks live enough to provide a decent dps gain and the loss of stats just isn't as significant for a moonkin as it would be for most casters. With that said it's hard to tell if Nibelung is actually a dps increase over my ToGC 25 MH/OH combo but it does seem competitive, my numbers were pretty comparable to top WoL parses:
Given that we're only talking about 6 ilvls difference and heroic vs non-heroic loot, I'd say that's a pretty good bonus in Nibelung's favor.
The only really bad fight for it is Blood Queen - her pulsing aura shreds the valks in about 6-8 seconds basically every time, so I used the MH/OH combo there.
Owlkin Frenzy -
This is just a general FYI. Blood Queen's Pulsing shadow aura (the same one that kills Nibelung Valks) has a silver lining - it can proc Owlkin Frenzy.
On our kill I had just under 40% uptime with 3/3, which means the talent is worth more then 1% dps per point - very much worth speccing into for this fight (although if you're expecting a lot of procs on other fights, prepare yourself to be disappointed). On other attempts I saw as high as 50% uptime.
My Take on WoD Alpha Patch Notes
2 years ago