See what materials you need in the Best In Slot Gear video:
   • Persona 3 Reload All Party Members Be...  

Material Location List:
Dead Moon's Husk Floor 251. Save scum from Floor 250.
Nihil Ore Monad Doors in on floors 70118 and in striped chests in higher floors
Prime Nihil Ore Monad Doors in on floors 173226 and in striped chests in higher floors.
Prime Nihil Blade Monad Doors in on floors 173226 and in striped chests in higher floors.
AS Refined Material Monad Doors and striped chests from the 5th block of Tartarus and up.
Nihil White Model Striped Chests and Monad Doors in the final block
Nihil Black Model Striped Chests and Monad Doors in the final block
Soul Sea Drop Heart Items of Persona in 6070 range. Also can be traded for in the Antique Shop.
All Heart Items Farm for the Lover's Arcana card then fuse the Persona.
All Gems except for Rubies Club Escapade
Rubies Final block of Tartarus from many shadows, especially strong shadows
Gold Quartz Drops from strong shadows in the final block of Tartarus
Silver Quartz Can be traded for at the Antique Shop
Black Quartz Can be traded for at the Antique Shop

0:00 (Intro)
0:22 (Why you need Dead Moon's Husks)
0:47 (Dead Moon's Husks Farming Method)
1:42 (Other Important Materials for End Game Gear)
2:28 (How to get Heart Items from Persona)
4:16 (Important Social Links to max for Heart Items)
5:14 (How to farm Gems and Quartz)
6:05 (Final Summary)