function xShieldSaves()
	if GetRaidRosterInfo(1) then
		for i=1,GetNumRaidMembers() do
			if healthPct("raid"..i) < .25 and xUnitInRange("raid"..i) and not buffed("Weakened Soul", "raid"..i) and IsAlive("raid"..i) then
				TargetUnit("raid"..i);
				CastSpellByName("Power Word: Shield")
				TargetLastTarget();
				local shieldname = UnitName("raid"..i)
				RunLine("/raid i put PWS on "..shieldname)
				return
			end
		end
	elseif GetNumPartyMembers() > 0 then
		for i=1,GetNumPartyMembers() do
			if (healthPct("party"..i) < 0.25) and not buffed("Weakened Soul", "party"..i) then
				TargetUnit("party"..i);
				CastSpellByName("Power Word: Shield")
				TargetLastTarget();
				local shieldname = UnitName("party"..i)
				RunLine("/raid i put PWS on "..shieldname)
				return
			end
		end
	end
end


--you call it with this:
--[[--

	if not ImBusy() and spellReady("Power Word: Shield") and InCombat() then
		if (Shield_wait == nil or GetTime()-Shield_wait > 2.5) then
		Shield_wait = GetTime();
		xShieldSaves()
		end
	end

--]]--




--you prolly have the functions below already.

function xUnitInRange(Unit)
    if CheckInteractDistance(Unit, 4) then
	return true;
    end
    return nil;
end
function healthPct(unit)
    local unit = unit or "player"
    return UnitHealth(unit) / UnitHealthMax(unit)
end
function IsAlive(id)
	if not id then return end
	if UnitName(id) and (not UnitIsDead(id) and UnitHealth(id)>1 and not UnitIsGhost(id) and UnitIsConnected(id)) then return true end
end