It's a personal preference what you procure and equip to your characters. We've already told you in a sense with Walk-throughs.

My personal favorites if that's what you're asking is displayed in my sig. It's not easy to know what should be equipped depending on how you beat the game.

The Ribbon does everything many others do. Discard amulets, star pendants, and such.
The Economizer makes the Gold Hairpin obsolete.
The helmets are tricky because you are limited on Genji Helmets. 5. The Green Beret and Red Cap is good early on. You might be equipping the circlet/crystal helmet mostly.
The Armors are more straightforward. Each character kinda gets a special armor. What would be left is Crystal Armor.
All the weapons are special. You will end up not using a bought weapon at level 99 in mine.
There's an argument that Thunder Shield beats Genji Shield in terms of resisting elements. Besides Paladin Shield and one other I'm not thinking of right now, those are the only shields you need.

Hope this helps.