[zork]

Finished my test. Thank god. UNIT_HEALTH_FREQUENT does fire correctly for all boss units. No clue what is wrong with UNIT_HEALTH. So adding frequentUpdates to the boss unit healthbars fixes the health issue.

If you are changing your health values via tags make sure that boss unit health strings use a health tag that uses UNIT_HEALTH_FREQUENT aswell. Otherwise only that statusbar will update correctly. I suggest creating a new tag for that purpose since you may not want that event on all units.



I will just post some stuff I'm using atm:

Boss tags

--boss health value
  oUF.Tags.Methods["diablo:bosshp"] = function(unit)
    local val = oUF.Tags.Methods["perhp"](unit)
    return val or ""
  end
  oUF.Tags.Events["diablo:bosshp"] = "UNIT_HEALTH_FREQUENT UNIT_MAXHEALTH UNIT_TARGETABLE_CHANGED"
  
  --boss power value
  oUF.Tags.Methods["diablo:bosspp"] = function(unit)
    if UnitIsDeadOrGhost(unit) then return "" end
    local str = ""
    --power value tracking (show percentage if max power > 0)
    local pp_max = UnitPowerMax(unit)
    if pp_max > 0 then
      str = str..oUF.Tags.Methods["perpp"](unit).."%"
    end
    --additional altpower tracking
    local ap_max = UnitPowerMax(unit, ALTERNATE_POWER_INDEX)
    local color = "0099ff"
    if pp_max > 0 and ap_max > 0 then
      str = str.." ("
    end
    if ap_max > 0 then
      local ap_cur = UnitPower(unit, ALTERNATE_POWER_INDEX)
      str = str.."|cff"..color..("%s%%"):format(floor(ap_cur/ap_max*100)).."|r"
    end
    if pp_max > 0 and ap_max > 0 then
      str = str..")"
    end
    --return "93% (|cff"..color..("%s%%"):format(30).."|r)" --debug
    return str or ""
  end
  oUF.Tags.Events["diablo:bosspp"] = "UNIT_POWER UNIT_MAXPOWER UNIT_TARGETABLE_CHANGED"

Boss health statusbar. The powerbar does not need frequentupdates it works properly without.

self.Health.frequentUpdates = true

I added this to oUF/units.lua

elseif(unit:match'(boss)%d?$' == 'boss') then
    object:RegisterEvent('INSTANCE_ENCOUNTER_ENGAGE_UNIT', object.UpdateAllElements, true)
    object:RegisterEvent('UNIT_TARGETABLE_CHANGED', object.UpdateAllElements)

INSTANCE_ENCOUNTER_ENGAGE_UNIT is unitless thus the third attribute has to be set to true.