This has probably been covered somewhere else, but I can't find it:
The enchanter's ring grants the casting mage a 1 mana discount when casting an enchantment once per turn, but it doesn't specify whether this is to the casting or reveal cost, so I assume it's to the casting cost.
The ring of curses and force ring (and maybe some other rings I'm not thinking about right now) specifically say that they give bonuses once per turn to specific types of spells, and if the spells are enchantments they only get the bonus to the reveal cost.
So could a warlock wearing both an enchanter's ring and a ring of curses get a 1 mana discount to the casting cost of an enchantment curse and a 1 mana discount to the reveal cost of an enchantment curse in the same turn?