Actually the lucy form would be perfect for combos.. as long as it's one parent, and not two. If a lesser/lesser lucy was used as one parent.. then all offspring would be lesser + other parent, so it makes it easier to make designer combos, very useful
But I think you mean making something that is lucy + other.. which would be neat genetically.. but visually it's liable to be another all white snake, instead of something new and cool looking.