With that particular game, you DO NOT need to spread to have an advantage.
you need an empty table, or 1 other person, and you need very precise and astute index play.
I know that particular casino well, and you would not need to spread to beat it.
Now if you wanted to make some money on it, a 2-1-3 spread with strong index numbers could do some damage.
$200 off the top and at neutral counts, $100 on negative counts, $300 on + counts, and a roughly $30,000 bankroll.