I just wanted to bring attention to a discrepancy with the Double Cast relic. When using a charge for the Iban Staff there is not a 90% chance to save a charge, which I thought at first was intended but then the Slayer Staff (e) was given the 90% save chance and it functions very similarly to the Iban's Staff, as opposed to the Trident.
TL
R: Extend the 90% chance to save charges to include Iban Staff similar to Slayer Staff (e)