In my experience(which comes from a 25 man guild perspective) SoTF can be pretty useful in certain situations , specifically at bosses like Fang , because of the way he does damage to your raid. Incarnation is amazing if your raid , or certain multiple members of it take moderate , relatively constant damage -just lifebloom the players taking the damage and take advantage of the free regrowths. On bosses like Fang HC though , where the raid takes huge amounts of burst damage SoTF can be very useful if used with WG for thee burst healing as well as used for tranq , bringing it's cast time closer to 4 secs(particulary useful in the arcane phase when the raid gets devastated and you need to move out quickly).
To my suprise i found out that the mushrooms , if utilized properly can be a little useful for burst healing . They are still a ridicilously weak spell when used to heal 25 ppl , but the burst healing might save a few lives and most of all the mana cost is very , very low , so you can use them to balance your mana comsumption. The trick is to place them down when you have nothing better to do .
One last tip i actually picked up from hamlet- use an intel flask , not a spirit one-the extra output is a lot better than the regen if you know how to play. I used to stack as much spirit as possible-i had 11k spirit unbuffed and 2x trinkets that procc spirit. Now I've reduced my spirit to 9.5 k and increased my throughoutput stats , such as intel and mastery and i find the change to be rather positive to my overall performance.

You can't really compare 10 and 25 man healing- i agree that tree of life might be better for 10 man , since you can just lifebloom 8-10 members of your raid before the aoe. In 25 man though you do not have the option of hotting everyone up and SoTF is much more useful imo.

Since you linked logs I just can't help to share my satisfaction with the results from my specc and gameplay

World of Logs - Real Time Raid Analysis

On a different note there are many bosses where i prefer Incarnation as well such as Elgalon and Will of the Emperor normal-Tree of life is definitely stronger in those fights imo , but that's just because of the mechanics of them

Well, I wasn't comparing 10 vs 25 man. I was stating that I found Incarnation more useful for our 10 man progression so far.
I just find the fact that you and I find SotF and Incarnation useful for opposite situations somewhat amusing. I'm sorry if I accidentally brought up that 10 vs 25 argument.

Hehe , yeah I agree the talen choice in the tier is fully situational and somewhat personal . I don't find it suprising though that we have completely different prios , since 10 man healing with a druid is very different and it's where druids can be stronger imo . 25 man Burst aoe healing is painful as a druid provided that besides tranq we have no other appropriate abilities in our toolkit to deal with 25 ppl taking huge chunks of damage in a short period of time. I am a bit jelaous of shamans , because their healing tide totem seems to do mroe healing than tranq and we have to channel it , rather than just use 1 gcd. Monks i have no comment on....
I still haven't accurately determined if SoTF benefits the periodic portion of tranq or just the channel time. If it does it would make tranq stronger than any other cd we have avaliable atm

That is correct SoTF does not affect the periodic portion of tranq

I started to write a response here regarding the current state of Druids and our toolkit, and evaluating where we fall in comparison to the other healers utilizing Raidbots and breaking it down fight by fight, but it was quite wordy and I utilized illustrations, so I posted it here instead: Same Problems, Different Day – Evaluating the Resto Druid Toolkit By The Numbers � Falling Leaves and Wings

The long and short of it is that Druids are performing significantly behind Monks, Shaman and Paladins. We are frequently underperforming Holy Priests, and it largely seems the only class in a worse position than we are at this stage are Disc Priests (or priests in general). I know it's been talked about a few times, but having seen all of the encounters and started work on heroics, I still can't help but feel that if our toolkit isn't shored up we will continue to fall behind the other healers in performance.

I still don't feel that smart use of things like NS, OoC or picking an "optimal" spec is going to be sufficient enough to solve the problems that we are seeing in a 25 man raid setting. Something fundamental needs to be fixed so that we are both competitive and viable.

Forsakenm - nice meters -- Since I can't come close to those numbers I'd love to know your general 30 second healing rotation and how you're tying SoTF to WG and Rejuv. That may help me see the errors of my SoTF patterns.

I thought Nourish wasn't worth casting at the moment? Maybe I got this wrong?

The tank damage is very heavy atm. Spamming nourish on the tank is always a way to go , but you should only spam it if you feel comfortable enough with your mana regen. If not you can spend some time puting down shrooms or just w8 for mana regen , but definitely refresh lifebloom with nourish-the combined mana effectivness is quite descent.

This is not accurate. At the moment Nourish has very low HPM. You would be much better off waiting for the tank to take enough damage to utilize a Regrwoth rather than just spam a very weak spell in our toolkit. In my work on this encounter last week there was not a single time I felt that nourish was 1)needed or 2) required to keep the tank alive. I'm fairly confident that you would actually save mana by waiting for a bigger hit that requires a bigger heal and healing it reactively. There are no hits so big that the tanks life will be taken down in a single blow, where you would not have the time to either cancel/cast or wait to judge the incoming damage and make a smart spell selection.

That note reminds me--is there a good third glyph for Challenge Modes besides Regrowth and Lifebloom? I still have HT installed but never do anything with it. I guess Rebirth--or maybe Stampeding Roar?

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"Nourish is not worth casting at all" is probably a mid exaggeration, but you basically want to break the habit of using it a lot, and then maybe think about times when you get some minor efficiency gain from working it in. Honestly though like Beru was saying--you could probably forget about it completely and you wouldn't miss much. Definitely don't subconsciously auto-cast it whenever you're not doing anything else.

At low crit rates and with Glyph of RG (and crit meta, which you should always have), Nourish/RG/HT all have very similar HPM (Nourish is only slightly higher). So in theory you can squeeze out tiny amounts of efficiency by using Nourish whenever you have time. Or in particular, when RG would overheal but you want top someone off or refresh LB rather than wait.

But the throughput of Nourish is so low that even worrying about this feels like a stretch in nearly any situation. You're taking over 2 seconds to drop 30k healing into someone. First of all, if it's a tank then by the time that cast finishes you may well have rather had the bigger heal anyway (this is actually something I use HT for--cancel-casting on a tank is a bit more convenient with the longer heal). Basically in any situation where getting people up actually matters, you can't use Nourish. And when someone's not at full but you have time to get them up completely at your leisure? That's when you drop a Rejuv on them and move on.

I've long said (well, since Cata beta I think) that the Resto filler heal should explicitly be Rejuv, and that the mechanics should fully support that. Given that Monks have shown they're willing to break out of the standard 3-heal framework, I hope this is something to revisit at some point.