I've been running with this glyph since the start. It was a boon in Malygos 10 where the HoT kept low hp casters alive(we had no druid for AR). I try to keep the HoT portion up as much as possible while hitting HL on any other encounters.

How much mana should I need If I want to try Hl healing with glyphed flash heal?

Hard to say, since it depends on how many healers you bring. But once you get to 25k mana buffed you can really get the HLs pumping. I have around that amount of mana and I didn't have big mana problems on Malygos 10 man, with me and a Holy Priest healing it. And that is a figth with quite high damage on both tank and raid.

I havn't done Saph with 3 adds, so I don't know how that compare with healing requirements.

25k mana means 5k more for me. SoYou useing only intellect gems and enchant wehere is possible?

I do stack mostly int, but there are also some of your items that are not even enchanted, so that will bring in a quite a bit of int by itself. Then when you get your BS up to the right skill level you will have 2 new sockets, 16*2 = 32 more int there. Add the shield, chest and bracer enchant to that and you have quite a lot of int.

You can also enchant your weapon with the intellect enchant.

How can 16 int be better than 23 sp, but 30 int is not better than 50 sp :s

23/16 = 1.4375
1.4375*30 = 43.125

43.125 < 50

Hard math.

If your goal is to reach the "magical" mana level so you can spam HL, wouldnt 30int be better until your gear can make up the difference? It seems to me 50sp if you are casting HL is rather trivial. I realize it all adds up in the end, but with current content spamming HL at 1800 or 1850sp makes little difference.

It's totally situational. You are not going to keep the tank up on Sapphiron spamming FoL since he dishes out 8-16k damage every 1.5-3 seconds (depending on whether he gets parry hasted or whether both the melee attack and the cleave hit the tank). It's a bit of a struggle with HL given the blizzard.

You're definitely not going to keep adds on Razuvious up for long or the OT in Patchwerk up with FoL unless you have others healing them also. I can get about 8k HPS with HL (in reality it runs about 6k effective healing per second when you mix in Beacon, Seal of Wisdom, Judgements, Divine Plea, etc...). Best you can get with FoL is around 2.5-maybe 4k with Sacred Shield if you're also using GCDs for Judgements, SoW, Beacon, refreshing the shield.

I've been trying to track through 10-man and 25-man fight lengths to determine which fights make more sense to stack haste and which it makes more sense to stack int based on the level of burst and length of the fight. We definitely brought too many healers to 25-man (naxx and sartharion) and 10-mans (all of them except Malygos where 3 was the right number of healers) this week, so it didn't matter what I stacked. Based on my estimates, it seems like almost none of the Naxx fights last longer than 5 minutes, with most around the 4 minute mark. Thaddius is a notable exception and we haven't done Sapphiron or Kel'Thuzad on 25 man to estimate.

___

Auriane, Blood Elf, Paladin

I've been using glyph of seal of light even though I HL a lot, simply because 5% more healing is both a little less than 5% more efficiency and a little less than 5% more burst HPS (or exactly 5% if it multiplies rather than adds up to the talent bonus), while 5% less mana cost is a little more than 5% added efficiency with no burst benefit. At the end though it depends how you value 1% increased burst as opposed to 1% increased efficiency.

Assuming the 5% from SoL stacks additively with the 12% from the talent, you get ~4.5% to both efficiency and burst ability. So with SoW you gain 3.1% efficiency but lose 4.5% burst. Is it worth it? Could be so, but I doubt it.
On a side note, 1% burst usually cost a lot more itemization points than 1% efficiency (at least assuming you trade int for haste or even sp), although I'm not sure how relevant that is.

You are neglecting the benefit the Glyph of Seal of Wisdom lets you chain cast more Holy Lights. A lot of times with how many HLs we can cast they overheal by a bit (but not enough that we should have used FoL), so the extra 5% healed won't really help as much. With my gear using Glyph of Seal of Wisdom over a 6 min fight it lets me cast 21 more Holy Lights.

There are some fights though where you won't use as much mana, and burst healing is important. I think those are more of the exception for non-easy fights. Though I am going to get together a set of gear that emphasizes my burst healing more.

Until I get a weapon from KT25 (and put 63 sp on it), I have two weapons. The [War Mace of Unrequited Love] with 30 int on it, and a [Grieving Spellblade] with 50 sp on it. I switch between the two depending on the boss.

Thaddius' first phase though is trivial, plus you get a break before the second, so I wouldn't really consider it worth mentioning as a "longer" fight. Especially considering that the second phase requires almost no healing either (I HS/judge/exorcism/HoW almost every time it's up). Remember that a long fight isn't effectively long if you're not actually healing intensively for the entire duration. Even sapphiron isn't that intensive since during air phases you don't need to heal the raid as much.

I just picked up my Darkmoon Card: Greatness. However, when it proces the +300 int I seem to lose about 200 mana. Anyone else seen this problem? I even tested it with just auto attacking a mob instead of healing and my current mana does indeed drop.

The +int "Greatness" proc on Wowhead shows it costing 6% of base mana. 6% of 2953 (lvl 80 base mana) comes to 177, which is pretty much in line with the mana deduction that you're seeing.

I don't think thats really necessary, we should be trying to apply the judgement buff once every 20 seconds (light or wisdom depending on the fight) so having our once a minute buff resistable doesn't really affect us that much.

On a side note, I'd just like to see what other holy paladins are seeing on WWS. I'm geared and glyphed more for holy light spam and as such on my reports lately have been getting around 50-60% overhealing and have been getting a bit of flak for that. Is this consistent with what other HL spammers are seeing? My unbuffed stats are 1900 spell power, 22k mana, 28.8% holy crit and 9.6% haste just so we have a reference point.

It seems completely rediculous that a trinket proc costs mana, but yes this 6% base mana is exactly what Im losing.

I get about 70% overheal and I only know this because one of our paladins was trying to out-overheal me the other night. You shouldn't get crap for it though. Your job is to keep people alive, especially if assigned to a tank. Overheal ONLY matters if you didn't land a heal at the right time because you were busy overhealing another target or because you went oom. I'm always assigned a tank so I look at it like this:

My tank didn't die. I didn't go oom. I did my job. Fin.

If I can throw out raid heals that's cool too, but ultimately the job is to keep the tank alive and 70% overheal says to me that my tank was mighty fucking safe (plus with BoL on the tank and raid healing it's impossible not to get massive overheal so even with only landing necessary heals I'm getting overheal).

My stats are about 50 less SP, 1k less mana, 5% less crit, and 5% more haste than yours.

Rawr shows me 30 int as superior to 50 and almost equal to 63 spellpower. (30 int : 50 SP ~= 4 : 3)
7 min Fight, standard 25 man raidbuffs, 100% activity, 80% replenishment, 1,5min DP Cooldown, 100% BoL Uptime with 20% efficiency.
PvE Spec without Kings. My Gear is pretty balanced crit/haste/mp5 (I think; not that I did have much choice in the matter, just gathered what was left by our full time holys/restos), mostly socketed for int except for some socket bonuses and the metagem.
I only got 50 SP to be better when turning of Replenishment completely.
Is there a flaw in rawr's calc? How does it come up with its result? How did you?

I'm normally protection for raids but am frequently asked to heal in 25man naxx/sarth/malygos. I'm not really experienced in healing in a 25man so I'm kind of lost here.

I have about 1k more mana, 100 less SP and 2% more crit, with about 12% (raid buffed), and I have pretty much the same results, around 70% overhealing, and I dont usually go oom. Sometimes I cut it fine but I'm usually one of the last healers to go oom, so if I'm going oom then the other healers are usually already oom, so it's likely it wasn't so much a mana issue as the fight went on too long or gear or something (though gear isnt really a problem with current raiding difficulty levels).