“Raregold Armor” & “Metalsilver Armor” only apply their effects when the same player controls the Equip Spell Card and the monster it is equipped to; you can equip these cards to a monster controlled by your opponent but the effect is not active.
If you have 2 monsters equipped with “Raregold Armor”, then your opponent cannot attack.
If you have a Warrior-Type monster equipped with “Raregold Armor”, and “Marauding Captain”, your opponent cannot attack.
If you have an Amazoness equipped with “Raregold Armor”, and “Amazoness Tiger”, your opponent cannot attack.
“Ring of Magnetism” ‘trumps’ “Raregold Armor”, “Amazoness Tiger”, and “Marauding Captain”. So if you have a monster equipped with “Ring of Magnetism”, and a monster equipped with “Raregold Armor”, the monster equipped with “Ring of Magnetism” is the target of attacks.
If you control “Patrician of Darkness” and have a monster equipped with “Raregold Armor”, you can only re-direct attacks to the monster equipped with “Raregold Armor” as it is the only legal target.