Any trips for blue spark training

I have a few 8⭐️ speed lineages, but I'm having trouble pivoting that into a stamina line for my long distance runners. The closest I've been able to get has been 560 stamina after placing second in URA Finale. I'm currently trying to train a strong lineage for Biwa using Super Creek and Rice Shower. Should I be taking 2 stamina cards rather than 1. I'm worried I won't be able to clear early speed checks in the story if I do