Haven't played much XV since rebeating the main story (burnt out a bit I guess?) but I did decide I could now try a couple more Cheat Engine tables. Using a new save slot, of course.
Mostly the table for increasing enemy hp/stat multipliers. It actually isn't too bad/works ok - since it's a multiplier, low lvl/starter enemies stay low level, it's the higher level enemies that get big hp/level boosts, which is what I'd want. A new playthrough you wouldn't have to wear the Nix Band for example - if you tend to reach the last story chapter at clvl 70, put the multiplier around 1.6 or 1.7 and there you go. You can just have their level and hp go up or also have it increase their physical/magic power and resistances. Don't want to get too crazy with that tho or you won't ever be able to do even 9999 damage to anything, let alone limit-breaking.
The other table is for adding "permanent" guest characters, whether Iris or Cor or Ravus or even Ardyn. I'm using Ravus and it's hilarious. He's useful in a fight. But he doesn't get a chocobo or ride in the car so he's forced to just chase after on foot. Funny stuff.