Everything that i haver heard about the super ball thing says that it is extremely hard to do. Have you ever kept a blood before? They are a lot of work. We have a couple. They are what we call "display" animals and breeders.

If you insist though, go for a male ball to a female blood. A male blood to female ball could hard the ball with too big of eggs.

Just so you know, female Bloods can grow up to be 30 pounds. They generally don't have the dispositions of balls either.