Can someone do the calcs if we choose NOT to go for T12 or T13 and equip not set items of DS?

From the spell data:
LFR - 0.831
Normal - 0.938
Heroic - 1.058

That doesn't really help us since most of those hits are probably cleaved hits onto the corrupted bloods (which for most strategies is wasted damage by the way, but that's not the problem here). We'd need to know some stats for single target fights so we know how many targets on average are required for it to outdamage VPLC.

From what I've heard it has an ICD of 30 seconds, so using your damage values (roughly 26.5k on average), it'd do ~860 DPS single target compared to the ~1400 of VLC heroic.

Thus you'd need on average at least 1.5 targets hit for it to outdamage VLC heroic single target as a moonkin. So, as long as these trinkets benefit from +% arcane damage and +% shadow damage respectively it's probably the best bet to get the VLC heroic as Balance and let other casters take CotC normal first.

So what's this all of those Hagara kill times of ~20 seconds on WoL? Is this some kind of parser bug or is there a mechanic in the fight that's being exploited?

A question about the addons.
If a player had difficulties seeing all proc / debuffs active (cause by vision problems, lack of concentration, etc ...) what addons you might recommend? Theoretically, the ideal add-on would be a tool that shows clear and visible signs near the character. This might help finish the rotation and refresh DOTs just before expiring. Maybe something less generic than Power Auras or Forte would be better... Any suggestions?

I know I am in the minority here but I use mage nuggets. it has a specific boomchicken setup. It has the popup boxes for our 3 mains including our two dots with timers. I separate those 3 down just above my bar so its out of the fight way. It has worked pretty well for me.

Instead of making yet another spot on the screen to look at, Inline Aura & OmniCC combine to put all of the pertinent information directly onto the action bar (they work fine with most bar mods). Button borders turn green or red depending on if the buff or debuff is active, and include numerical timers. There is also a glow effect that lights up for procs (starsurge, wrath during solar, etc). Both are customizable as well, but work fine just out of the box.

Above questions:
1) You can get double NG DoT's that way, but it tends not to be worth the extra GCD.
2) on explosion.

Also, there's another way you can get double NG DoT's--just mentioning it since I've heard some people wondering about Glyph of Starfire lately. If you MF, IS, SF at the beginning of an Eclipse, the SF will extend the MF and also apply NG to it. But ~11s later when NG ends, you'll still be in pre-Solar, and the next SF will cause the MF to lose NG for the remainder of its 27s duration. Still, something good to know. Also, might be worth rechecking all this on live since it's been a while.

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To fix in OP:
--FoN affected by spell hit.
--4T11 advanced notes are out of dates since it's been nerfed.

Also @Zenigen - you should RARELY be speccing Lunar Shower - it's generally considered a DPS loss for any fights with multi-dotting.

Someone pointed out that he could achieve higher dps with heroic boots rather than the VP ones with some strange reforge. I can confirm it, the strange reforge is spirit -> haste on boots instead of reforging away the crit rating.

Without DI you can go for the 3101 Haste breakpoint
If you manage to get another Girdle of the Grotesque, since we sit at 3026 haste we can swap 3 red gems in the belt for 3 orange to reach the 3101 haste breakpoint without DI

Wrathcalc gives me 50090.98 DPS (Night Elf) with DI in full Heroic BiS, Epic Gems and Dragonwrath
Using boots from VP and crafted bracers (I've manually added the +20int bonus to the bracers since it's clearly a bug and is gonna be fixed)

If you always have DI you can choose the Treads of Sordid Screams(heroic) and with some reforging achieve 37693,92 DPS (Night Elf) with DI in full Heroic BiS, Epic Gems and Dragonwrath
Using the crafted bracers (I've manually added the +20int bonus to the bracers since it's clearly a bug and is gonna be fixed)

Edit:
Maybe something is wrong in WC: in full BiS I always get a dps loss for using Glyph of Starsurge over any other glyph with any combination of Starfall...

Edit2:
I need to know for sure if the VP boots are BiS or not, because I don't want to waste an orange and a red epic gems :S

Can you clarify the setup you are using to achieve this figure?

[edit] Actually, I think this might be with Glyph of Insect Swarm and using Starfall every Lunar, which obviously doesn't work since it won't be off cooldown without 4t13 and GoSS. Even with those options, it's possible/probable we won't be able to actually pull off getting a Starfall in every cycle. [/edit]

It's certainly showing as more DPS in any gear setups I've found, but I don't think there is a concensus on what is 100% BiS yet.