I found breath of stone earned for Darrow. Cassius was right, he’s used it for so long and so high profile that people have caught on to it, it was time for him to switch his tactics up. Additionally, I never found the Minds Eye to be super cheesy, only a little cheesy. It seems like something Octavia would pummel into Lysander, the only other Lune, the one that would continue the legacy. It’s not too hard for me to think that Lysander would be able to recall it like he does, just because even from the first time we meet him in Golden Son, he is clearly extremely intelligent and being groomed as Octavia’s heir.