Now that Bohtauri has provided rank information I've started doing some analysis on the three primary healing trees for Clerics. I'm still in the process of entering data, but I have taken a look at the complete results for single target healing, untalented between the three classes (except for grabbing abilities like Healing Invocation and Healing Flare)
Some interesting and nonobvious conclusions can be made. The first is that Sentinel untalented has the highest HP/S with constant spam of Healing Invocation, at 200.5 HP per second. Healing Grace also isn't too bad, coming in at 185.25 HP/S. Purifier is close at 180.5 with their Restorative Flame. Surprisingly Warden's struggle quite a bit at achieving a decent HP/S score, with absolutely all their single target HoTs ticking and Deluge spammed every chance they get, they peak at 188 HP/S, and if you don't keep a difficult to cycle Healing Current in there it drops to 155 HP/S.
A near reverse situation is true of mana efficiency. The top leader at a startling 10 HP/MP is a fully stacked soothing stream, and the next 3 slots are the Warden's other regular single target heals, with the lowest being healing current at 7.3 HP/MP. Sentinel follows up with Healing Invocation at 5.9 HP/MP and their three other single target heals all close to that. Purifier is in last place with Restorative Flame at 4.9 and Healing Flame at 4.63. Healing Flare (their talented instant cast heal) has absolutely abysmal efficiency at 1.9 HP/MP.
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This is all untalented and ungeared information so far, and so is not entirely reflective of the classes in practice. Some very clear conclusions can be drawn though. Taking the upgrade Lasting Invocation for Healing Invocation isn't that useful as a Sentinel. I ran the numbers and spamming Healing Invocation every 3 seconds (losing 5 seconds on the lasting invocation) is still more HP/S and more efficient than trying to rotate in lasting grace, you end up with about a 10% bonus instead of 30%. However it might make a good move to rotate with restorative flame. Restorative Flame, starting out as the worse 3 second heal, gets potentially a lot better with the shielding talent, depending on how much wisdom one can get.
Warden's get about a 20% boost to their healing due to talents that the other two can't make use of, which helps them a little in the HP/S department. However, it's almost a necessity to take reduced casting time on deluge to boost their HP/S. Once they do however, they potentially become the most efficient and highest HP/S healer of the three.
I'll do some more work later. If anyone knows a good way to host the excel sheet I have with data, let me know.
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Testing has been more difficulty than I thought, because it's hard to test spells free of all the bonuses that normally come in any healing speck.
I was, however, able to test my level 21 warden spec in the Fae instance. Previously I had gone as a sentinel and used primarily Healing Invocation to heal.
If early levels are a good indication of what I can expect at higher levels, then I've seen two very important things. First, mana efficiency isn't that big of a concern. My second pass through the fae instance a warden, without even trying to be mana efficient--such as recasting my hots when only half their duration was gone--I never touched below 80% mana. Most of the time I was never below 90% mana. I don't remember exactly how low I hit on my sentinel, but I do remember thinking I had way, way too much mana. The second conclusion is that Damage and Healing relative to Max HP are very high.
The second part is quite important, because it determines how tanks die. When my 3 second heal restores more than 50% of the tanks HP, and each hit damages him for almost as much, timing heals starts to matter a lot. Warden spells proved fairly dangerous to heal with because you can't afford to over heal with Healing Current or Deluge, or else you you sacrifice too much HP/S, but at the same time you can't afford to wait around with either too much because that also sacrifice's HP/S and potentially screws your rotation. Letting Soothing stream drop because you were busy casting some other heal can really hurt you. Overall, while Warden may be potentially the best straight up efficiency and HPS healer when everything goes perfectly, it is also potentially the most error prone. Sentinel does fairly well with Healing Invocation spam, and that can be easily timed to flow with the nature of damage spikes. Purifier's Restorative Flame however is potentially one of the safest heals in the game. It's very similar to Healing Invocation, but with less efficiency and HPS. What makes it so good though, is the talent that goes with it. Shielding your ally an additional amount is a wonderful thing to have to help protect against spike damage and give you a wider safety net. At 21 I had 170 spell power, and so 60% would have been 102 HP. At 50 that could fairly easily be a 250-300 HP shield. While still lacking in both efficiency and pure HPS, that safety net seems like it could easily prevent more tank wipes in a 5 man party situation.
Edited, Feb 6th 2011 2:16am by Allegory
