If everything is ready, put the male in the breeding tank. Float a decoy female for a few minutes - just to get him to make a nest. Keep doing this daily until the nest is big enough (you've seen his nest before, so you should know... I can only guess).
Since your female (the one you want to spawn) is a fast egg layer And you know she flirts, keep her solitary - away from any male - until the male's nest is ready. You can flare her to a female if you ant to exercise her. When you feel the male is ready, release the female and make sure they flirt. If they do, let them do their stuff. If they don't take the female out and try again another day.
Good luck, hope they get it right this time.