[Corinthian]

Oops! Did I write Sword of justice? I meant to write: the Infernal Sword. Put it on a banelord, give him a pair of flying boots and put him on attack monsters and he'll become an excellent anti-SC. Tier three, at least. In theory off course. I have never tested it.

As for the Sword of Justice? It could probably be bumped up to tier four because it is situationally useful for bless-nations that lack level 3 priests. Ashdod, T'ien Ch'i, Lanka and so on. It really cuts down on the micro, make sure that everyone gets blessed, and allow you to recruit other things than priests in your castles.
Can also be used to bless all your sacred mages with that earth bless. This way they do not need to cast bless themselves, and can use the first turn to cast other things.

As for the twin spears, they are length 4 each, I think. Dual wielding them would give you -8 to attack unless you have ambidexterity. Also you have to sacrifice your shield slot, witch is always a bummer.