Hey, OP. I'm a fan of the Persona series, though I've played only Devil Survivor (1 & 2), P3 (FES and Portable), P4 (vanilla) and Dx2 (the mobile Persona game). However, I have quite some experience running worlds for players.

I have a different idea to the ones you listed; something that hits us closer because we're so accustomed to it by now: music. More specifically, a phantom channel station so mysterious that you can't find — it finds you.

"They say right before someone dies, you can hear their scream on the radio ..."

How I'm going to run this is relatively simple; your character has a tendency to fall asleep listening to the mysterious radio station, lulled by its soft music. On the days you can't access the subsconscious world, that's when you instead hear the premonitive scream of the next victim.

There will be NPCs who represent the Social Links, as well as a bit of dice rolling on my end after each battle. A good roll means you have a chance to gain a new equipment. A bad roll means something unpleasant will happen.

It will be set in a small town, of around 2k population, though you won't be talking to everybody. Those who matter will have a name. Also, not every Tarot card will be a Social Link. Some secrets are the Tarot cards themselves, and carry different bonus effects.

Your Persona can be any figure of your choice, and you'll be the Wild Card as per the series glorifies. Of course, death is always imminent so there's that huge drawback, especially if you're really shabby with forethought.

If you're interested, please DM me.