Is it just incredibly rare or impossible to get anything beyond a 1-star for your first summon? I've always just gotten Tronn, Leah, or this Rizer guy. Anyway, I finally got Firion from the 500 lapis summon. He's only a 3-star, but I'll take it. I wish I had gotten someone better than awful Rizer from the first story-forced summon, but I don't think I can stomach rerolling anymore.
Pretty sure that first one is always going to be a 1 star no matter what. It's the summon right after that matters.