function()

    --get total damage taken
    --variables to loop
    local i = 1
    local cur = GetTime()
    local total = 0
    while aura_env.dmgTaken[i] do
        --grab table entries with time and damage
        local time = aura_env.dmgTaken[i][1]
        local dmg = aura_env.dmgTaken[i][2]

        --if the damage happened outside of the timewindow
        if cur > time + aura_env.lastSec then
            --remove the entry
            table.remove(aura_env.dmgTaken, i)
        else --otherwise
            --add up the damage and go to next entry
            total = total + dmg
            i = i + 1
        end
    end

    --Value Based
    local current = UnitHealth("player")
    local max = UnitHealthMax("player")

    aura_env.curHP = current
    aura_env.maxHP = max

    --Versatility Rating
    local vers = 1 + (GetCombatRatingBonus(CR_VERSATILITY_DAMAGE_DONE) + GetVersatilityBonus(CR_VERSATILITY_DAMAGE_DONE))/100

    --Vampiric Blood
    local vamp = WA_GetUnitBuff("player", 55233) and 1.3 or 1

    --Guardian Spirit
    local gs = 1 + (select(16, WA_GetUnitBuff("player", 47788)) or 0) / 100

    --Divine Hymn
    local dh = WA_GetUnitBuff("player", 64844) and 1.1 or 1

    --Hemostasis
    local haemo = 1 + 0.08 * (select(3, WA_GetUnitBuff("player", 273947)) or 0)
    --Skullflower's Haemostasis legendary
    local haemoleg = 1 + 0.2 * (select(3, WA_GetUnitBuff("player", 235559)) or 0)

    --Lana'thel's Lament legendary
    local lana = WA_GetUnitBuff("player", 188290) and IsEquippedItem(133974) and 1.05 or 1

    --Dark Succor, Unholy/Frost
    local succor = WA_GetUnitBuff("player",101568) and (0.1 * aura_env.maxHP) or 0



    local heal = total * aura_env.percDmg --damage taken * DS percentage
    local perc = heal / UnitHealthMax("player") --relative to maxHP
    perc = math.max(aura_env.minHealthPerc, perc) --minimum DS percentage
    perc = perc * vamp * vers * gs * dh * lana * haemo * haemoleg --apply all multipliers except succor
    heal = perc * UnitHealthMax("player") --get the actual heal value
    heal = heal + succor --add succor

    --store the values in aura_env variables to access them from other locations
    aura_env.healing = heal


    --print()
    aura_env.expected = heal
    --print(current)
    --print(aura_env.display)

    return current + aura_env.healing, max, true

end