On Hodir HM you can pop 2 Starfall without any issue at all.

The Adds on Freya out of control? doubtfully, the giant Tree is always well aggroed, and the other 3 Minions are never an issue.

I’ve got yet to see how ICC is in terms of AOE, we’ll see.

So far, out of my Raid Testings, altering my rotations, the 2xT8 (which seems not to be the optimal parts, pants and gloves and 393 hit, kthx), i end up getting almost the same result, i’ve got yet to confirm if I really can justify having IS Glyph, going back to 25mans today, and will probably try to log my fights so i can be a little more objective. Refreshing IS at all times haven’t shown a notable difference either.

That said, I prefer the Glyph of Starfall over the Glyph of Insect Swarm. Mathematically, I cannot justify this, so I may actually be nerfing myself. It is important to note, too, that during Eclipse, I only reapply MF during lunar Eclipse and IS during solar Eclipse, with the exception of any additional set bonuses (IS for 4T8, MF for 2T9 and the idol).

On Razorscale, it just kills mobs faster, and you stand around looking like a headless turkey for a long time anyways.

Iron Council is sketchy at best, because they aren’t tanked on top of each other, so the damage done is the same as on a single target boss.

Kologarn is alright because it might splash over and it helps on the rubble.

The benefit on Hodir is very small – i never get to pop it anyways, except for on the pull, but they are spaced out enough to make it not splash – so the damage is the same as if it was just on a boss.

Thorim is single target for the Thorim part of the fight, and the rest of the time you are only fighting 2-3 mobs mostly.

Freya is a valid point, but you don’t want to risk the adds getting out of control. It can be great on hard mode, where you want to nuke down the lashers quickly after their stun, but you wouldn’t want to use it when the pack of three are getting close to death.

Mimiron, valid point – its also VERY much worth it in phase 4, with the three parts right on top of each other.

It is deadly to use on Yogg-Saron phase 3 – trust me on that, with the adds coming in, they are almost sure to come to you if you have popped starfall, but it might help a bit if a few tentacles are bunched together.

50-100 DPS difference on a dummy will mean a lot more in a raid where you are fully buffed and the target is fully debuffed. But, as you probably know, that doesn’t really matter anymore now that they are nerfing T8. You should still stick with 2pt8 for the best results.

Anyways, on another of your points, 2xT8 really is overpower, there no way to counter that, but lately as my gear has been going up, the benefit is really marginal over what im using now (4xT9.245 + Leggings of the Awakening 245), in the Dummies at least the difference is about 50-100 DPS on OPTIMAL conditions, which are far from the reality, have you tried using 4×245 on other fights? i REALLY need to start logging my fights to analyze my numbers a bit more…

Starfall is a great ability to use a GCD on, but not a glyph, unless you have an AOE fight where it makes sense. You still get a much, much bigger increase (almost 3 times as much) by using glyph of Insect Swarm.

With the gear i have, mostly 245+, i usually will have Nature’s Grace up regardless. Each Nature’s Grace gives me enough time to get three wraths off in 3 seconds, and most of the time it will crit – on a random fight i just looked up, it critted 45% of the times, so that should keep Nature’s Grace up regardless. We usually wont need Starfall for that

So, why Is over Starfall? (maybe im missing some numbers).