The term "Perfect" in Touhou survival

"Perfect" is a much easier term to understand for most people than "LNN(N)(FS)". LNN(N)(FS) is an abbreviation of Lunatic No-Miss No-Bombs (No third condition, like No-Release) (Full Spell, meaning all spell cards are captured), but most people that aren't deep into STG/Touhou gameplay don't know this too well (which is understandable because it's a really abstract term). "Perfect" is a term people look for much faster than Lunatic No-Miss No-Bombs, therefore it's much more convenient to use this on a site where you're trying to appeal to a general audience that uses search tags to find videos.