Well, you could consider going for 3/3 Living Seed...
But yeah, if this is your main problem (which shouldn't be, because it is after all an ulikely scenario), use whatever you have to get through. First of all, make sure both ice blocks don't interrupt your line of sight to the tank - everybody should know where to stand if he is a target. Then your priest should use the remaining seconds to give your tank a Shield and Pain Suppression, while your Shaman should make sure the tank is at 100% hp. And then he needs to use a cooldown or two for himself, while your DDs focus on getting the other healers out. Just save Nature's Grace for this moment, stack your Hots and spamheal him.
And if you're still having troubles then, maybe try having someone taunt and kite Hagara for some seconds?
But again, this situation shouldn't occur very often.
Some different things that worked well for us: You probably already know this, but if you tank the boss at the edge of the platform, he should very rarely (if at all) use Shattered Ice. Moreover, there's oftentimes someone dying to Ice Lance, which should not happen. We set up three teams of two players each to interrupt them and assigned them to specific sides (team a takes the left lance, team b the one in the middle etc, which of course requires you to tank him at a specific location, see above). One last thing (which you probably already know, too, but it helped us a lot so just to make sure): positioning yourself like in this guide (A Guide to Heroic Hagara [VOX] (DS) - YouTube) makes the lightning phase rather easy.
This isn't something you can do but you can suggest that the Shaman healer drop a Spirit Link right before they are frozen. Aside from that, ask your tank to prepare his own CD and prepare to spam if necessary - this isn't really a mana intensive fight. Priest could give a CD right before but I'm sure the Spirit Link will be more than enough. Also, in case your Shaman didn't know this, Grounding works on Shattered Ice.
I will relay your advices to our raid team and will go Living Seed for this fight.
I've been considering it before and seems it the right choice. I will also drop Nature's Switftness because benefit from it is very minor.
I will also swap Regrowth glyph for Lifebloom - i use Regrowth glyph for Yor'sahj and Morchok and i forgot to switch it back to Lifebloom glyph for Hagara. Should help a little as well.
Lightning phase usually ends well for us - we do just like in that guide you mentioned. We even learned to correct each other mistakes and mechanic bugs - sometimes lightning just won't jump even at close distances.
Now we rarely die during lightning phase.
I actually found Nature's Swiftness to be somewhat useful in DS, because some bosses have very high damage spikes you cannot always prepare for accordingly. I found it useful especially for Hagara, because sometimes the lightning just doesn't connect instantly and then someone might need the instant and empowered Healing Touch, for example. It's by no means a big difference whether or not you go for it, though.
It try to keep my question as simple as possible :-)
What did I do wrong? My Gear is not to bad ...i try to stick to all the guides on elite jerks but I still couldn't keep up with the others plus I produced a big load of overheal. What can I improve and how can I improve :-)?
I assume you are talking about the Zon'ozz HC wipes? Because on Morchok there's just not enough to heal, and the little there is the other healers are much more likely to get, resulting in high overheal on all your hots.
First of all, your gear is fine, but don't go for bad socket bonusses (gloves, one ring). Second, while 3 minute wipes might not be the best indicator, some of your uptimes and spell uses are way off. Just to give you a general idea on how I heal the boss:
While you're stacked in the two camps during the normal phase, just keep up lifebloom on the tank if you are in range of him (standing in the melee camp, that is), or on yourself if you aren't. Make sure to use Wild Growth on every bounce and Swiftmend on CD. Heal up the remaining damage with Nourish and Rejuv, and just blanket everyone for the last two bounces of so. During the black phase run to your position, Rejuv and Wild Growth the players you are to heal and use Tranq. Heal up the remaining damage after Tranq with more Hots and Nourish. Then repeat P1; some 5-10 seconds before the second black phase just use ToL and start putting 3 stacks of Lifebloom on yourself and the other players you will be healing. You'll have tranq up for the 3rd black phase again.
What confused me about your logs: You don't seem to be using Nourish very much or at all in some fights. Use it a lot more often! It has very low mana costs, so in fights where healing matters you could be using it on every free GCD, basically. This would also help you with your uptime on Harmony, which is as low as 50% sometimes. Also, you seem to be casting Regrowth (and sometimes Healing Touch) too often, especially considering your very low uptime (as low as 20%!) on Lifebloom. Lifebloom triggers Clearcasting, so just keep it up on someone who takes damage.
In patch 5.0.X for PvE, does it make sense to use Glyph of Regrowth? If so, when does it make sense to use Healing Touch instead of Regrowth? It seems like Regrowth gives roughly equivalent healing for roughly equivalent mana, but is much faster to cast and guarantees a Living Seed proc.