local mytarget = "player"
local lowest = 100 * UnitHealth(mytarget) / UnitHealthMax(mytarget)
local group = "party"
local members = GetNumPartyMembers()
lowhpmembers = 0

if GetNumRaidMembers() > 0 then
  group = "raid"
  members = GetNumRaidMembers()
end

for i = 1, members, 1 do
  local member = group..tostring(i)
  local memberhp = 100 * UnitHealth(member) / UnitHealthMax(member)
  if UnitGroupRolesAssigned(member) == "TANK" then memberhp = memberhp - 5 end
  if UnitThreatSituation(member) == 3 then memberhp = memberhp - 5 end
  if memberhp < 95 and UnitInRange(member) then lowhpmembers = lowhpmembers +1 end
  if memberhp > 1  and memberhp < lowest and UnitInRange(member) then
    mytarget = member
    lowest = memberhp
  end
end