A very gifted guildie of mine (Meloeth, EU-The Maelstrom) wrote an addon that uses combat log events and information to calculate health amounts as they occur rather than waiting for the UNIT_HEALTH tag from the server. It's been extensively tested in our guild the last few months and he's finally released it:

Instant Health | World of Warcraft Addons | World of Warcraft @ Curse.com

Healing using this and grid/pitbull was error-free and the difference immediately noticable. Health bars are extremely reactive to all incoming/outgoing changes. You will also notice that your and other's health bars dip into the negative before the server catches up and actually 'kills' you. It is possible, though rare, to save someone who dips into the negative if they are healed before the server catches up, or also to avoid a hit that would otherwise kill you by vanishing/blocking/bubbling.

The single detriment is that Recount and other damage meters will not show accurate healing meters using this addon. As the health update is instant, the meter waits for the unit_health message and then tends to view most healing as overhealing.**

**edit: Meloeth has updated his code and now all damage meter and combat text addons should play nicely. Make sure you download the newest version on the Curse Page!!!

In any case it is a large improvement and I recommend it to everyone. It is also something I haven't seen before which is why I thought it deserved it's own thread.

Meloeth has explained the mechanics further on his Curse page, Enjoy!

Seems like a very nice addon from just testing it by myself but I'll reserve final judgment until Felmyst tonight. There are lots of times where I know an aoe has gone off and I don't see it on grid for a good 1-2 seconds which seems to be mended with this addon. Thanks.

Interesting addon, I didn't think UNIT_HEALTH was so badly affected by latency.

Should be fixable with a few events.

Although, I'm not sure how you plan to add health from buffs, are you scanning health at some point?

I think you can see the effect of it when you view death reports from Expiration sometimes on Brutallus, you'll see a MH OH hit when the tank is say 75%, see 8 heals land, and then suddenly it says he died with no other damage taken. The health update was after the damage had already killed him and also after the heals claimed to have landed.

Running this mod would not affect the combatlog, and hence screw with WWS, correct?

Pretty sure this is correct as I think /combatlog output cannot be influenced in any way trough addons.

The addon shouldn't affect the combat log or WWS at all.

As far as the added health effects, I think that the addon checks against current health values on the health update hook, insuring that the players/member's max health value is constant, and then calculates the change in that value using combat log data <----- This could be totally wrong as I'm just a lowly user and don't pretend to truly understand how this works

I have invited Meloeth to register here and take part in the discussion. I'm sure he can answer your questions better than I.

Are you sure you read what this addon does Zypora? I recommend you read the first post/curse page again. And again.

ps: there is nothing special about Renew, it has always worked the way it should on every meter

Yup Vorda,

you are right, misunderstood. I have been a bit to fast.
/offtopic

How does this handle Kalecgos? A lot of times, you're not in combat lot range of half the raid.

Healer A enters portal 3 seconds before DPS B. As Healer A's Spectral Realm debuff falls off, demon begins casting shadow bolt volley. DPS B is hit by volley before exiting. Healer A is responsible for healing DPS B, but didn't catch that damage in the combat log, therefore, health bar hasn't updated.

Does it still update on a HEALTH_UPDATE event or what?