[Fizzlemizz]

local perc = Percent(cur,max)

Would appear to be converting current health into a percentage of max so if you just change perc to cur as the return by:

	if perc >= 76 then
		return "|cff00d036%s%%|r", cur
	elseif perc >= 26 then
		return "|cfff19c08%s%%|r",cur
	else
		return "|cfff10808%s%%|r",cur
	end

You also have duplicate

local s = Status(unit)
if s then
    return s
end

Statements.

For the boss (this will change the display for any unfriendly target) you woulld need to substitute

else
	return "%s/%s",Short(cur,true),Short(max,true)

for

else
	return Percent(cur,max)