Will start from Level 3 and go down to Level 0, then by category, then in order from weakest to strongest (and support (regular support > healing) > offensive)/in order of how the items are listed on the Items List. The following is the template:
Weapon/Item | Skill | Element | Attack/Magic/Support/Healing
Level 3
Scythes:
Level 2
Rapiers:
Spears:
Claws:
Dragon Wings:
Pendants:
Power Wrists:
Level 1
Swords:
Whips:
Ice Orbs:
Fallen Fans:
Holy Water:
Level 0
A complete list of items that can be used in battle can be found here.
Weapon/Item | Skill | Element | Attack/Magic/Support/Healing
Level 3
Scythes:
- Hell Scythe | Serene Combo | Ice | Attack
- Ogre Blade | Serene Blast | Ice | Attack
- Burning Sun | Serene Inferno | Fire | Attack
- Black Scythe | Serene Nightmare | Neutral | Attack
- Silver Moon | Serene Almighty | Ice | Attack
- Infinite Arc | Serene Absolute | Ice | Attack
Level 2
Rapiers:
- Rapier | Stinger | Neutral | Attack
- Silver Rapier | Straight Slash | Holy | Attack
- Estoc | Hell Stinger | Neutral | Attack
- Holy Sabre | Evil Break | Holy | Attack
- Blue Stinger | Ice Stinger | Ice | Attack
- Rosier | Judgment | Holy | Attack
Spears:
- Gae Bolg | Illuminance | Neutral | Magic
- Ice Javelin | Serpent | Ice | Magic
- Cross Lance | White Flash | Holy | Magic
- Crystal Lance | Blue Gleam | Ice | Magic
- Silvia | Crystia Cannon | Ice | Magic
Claws:
- Harpie Talon | Wild Tear | Neutral | Attack
- Blood Fang | Blood Rave | Neutral | Attack
- Wyvernzem | Fenrir Attack | Ice | Attack
- Leyte Claw | No Mercy | Lightning | Attack
Dragon Wings:
- Wyvern Wing | Wind Cutter | Neutral | Attack
- Wyrm Wing | Wind Hazard | Neutral | Attack
Pendants:
- Pendant | Shining Star | N/A | Support
Power Wrists:
- Power Wrist | High Tension | N/A | Support
Level 1
Swords:
- Iron Sword | Mage Stream | Neutral | Magic
- Flamberge | Volcano Strike | Fire | Magic
- Thunder Blade | High Voltage | Lightning | Magic
- Mithril Sword | Bone Breaker | Neutral | Magic
- Zephyr | Voltek Wave | Lightning | Magic
- Gran Sabre | Sonic Spear | Neutral | Magic
Whips:
- Rose Whip | Rumble Smash | Neutral | Magic
- Flame Whip | Flare Burst | Fire | Magic
- Thunder Chain | Bolt Gash | Lightning | Magic
- Viper Whip | Detonator | Fire | Magic
Ice Orbs:
- Ice Orb | Ice Resist | N/A | Support
- Ice Crest | Ice Resist | N/A | Support
- Ice Emblem | Ice Resist | N/A | Support
Fallen Fans:
- Fallen Fan | Black Tornado | Neutral | Magic
Holy Water:
- Holy Water | Air Spray | Holy | Magic
Level 0
- Cheer Bell | Ring | N/A | Support
- Happy Plume | Tickle | N/A | Support
- Harpie Plume | Tickle | N/A | Support
- Mage Ring | Equip | N/A | Support
- Amulet | Equip | N/A | Support
- Earrings | Wear | N/A | Support
- Ribbon | Wear | N/A | Support
- Rosary | Raise to Heaven | N/A | Support
- Flag | Cheer | N/A | Support
- Hourglass | Flip | N/A | Support
- Black Earring | Wear | N/A | Support
- Black Choker | Wear | N/A | Support
- Hair Ornament | Wear | N/A | Support
- Banango | Eat | N/A | Healing
- Applecot | Eat | N/A | Healing
- Potion | Drink | N/A | Healing
- Elixer | Drink | N/A | Healing
- Steak | Eat | N/A | Healing
- Over-Easy | Eat | N/A | Healing
- Bread | Eat | N/A | Healing
- Dragon Steak | Eat | N/A | Healing/Support
- Bomb | Smart Bomb | Fire | Attack
- Spider Web | Entangle | Neutral | Attack
- Slime Ball | Throw | Neutral | Attack
- Beehive | Bee Assault | Neutral | Attack
- Dud | Sling | Neutral | Attack
- Tarot | Devil | Ice | Magic
- Magna Rock | Throw | Neutral | Attack
- Mr. Bat | Vampire Night | Neutral | Attack
- Killer Beehive | Bee Cannon | Neutral | Attack
- Bat Jr. | Vampire Night | Neutral | Attack
- Mr. Bat III | Vampire Night | Neutral | Attack
- Ignis Spear | Phoenix Dance | Fire | Magic
- Battle Pixies | Delta Formation | Holy | Magic
- Night Scythe | Nightmare Chill | Ice | Magic
A complete list of items that can be used in battle can be found here.