Not sure if this has already been made, but I thought I'd make list which weapons are best against which enemies. It's in the format of Weapon:enemies. Enjoy^_^
Rebellion: No element, so should be none, but works well against Dulahane because its a bladed weapon.
Cerberus: Abyss, Agni, Geryon, Nevan, Gigapede
A&R: Arachne, Cerberus, Gigapede, Bloodgoyles, Heart of Leviathan. Good against Dulahane as well because its also bladed like Rebellion. Agni and Abyss however, take less damage from A&R as their elements are fire.
Nevan: No element like Rebellion. But takes out enigmas arrows with any move that summons bats, and if you use combo 1 or 2 against Bloodgoyles permently, it will turn them to stone before they hit you. Except if they DT, in which case they hit you, then turn to stone.
Beowulf: Hells Vanguard, Nevan, Doppelganger, Arkham, and also quite good against Vergil/Vante.
Yamato: Beowulf and The Fallen. It's actually lethal against them in my opinion. Good against Dulahane for being a sword.
Force Edge. Just like Rebellion really, except that in Vergil's combo with it because you use Yamato as well, any part of the attack that uses Yamato applies to that as well.
Phew, finally there!
Rebellion: No element, so should be none, but works well against Dulahane because its a bladed weapon.
Cerberus: Abyss, Agni, Geryon, Nevan, Gigapede
A&R: Arachne, Cerberus, Gigapede, Bloodgoyles, Heart of Leviathan. Good against Dulahane as well because its also bladed like Rebellion. Agni and Abyss however, take less damage from A&R as their elements are fire.
Nevan: No element like Rebellion. But takes out enigmas arrows with any move that summons bats, and if you use combo 1 or 2 against Bloodgoyles permently, it will turn them to stone before they hit you. Except if they DT, in which case they hit you, then turn to stone.
Beowulf: Hells Vanguard, Nevan, Doppelganger, Arkham, and also quite good against Vergil/Vante.
Yamato: Beowulf and The Fallen. It's actually lethal against them in my opinion. Good against Dulahane for being a sword.
Force Edge. Just like Rebellion really, except that in Vergil's combo with it because you use Yamato as well, any part of the attack that uses Yamato applies to that as well.
Phew, finally there!