I have 2 rings with HIGH mana & FCR
one is Great Wyrms Ring of the Apprentice: 10% FCR/+74 to mana; lvl req:29
the other is even better:
Bahamuts ring of the Apprentice: 10% FCR/+113 to mana; lvl req: 37
I don't know how much you are willing to offer for these, but is your whole trade list ladder or non? If it is ladder there are a few things I would be interested in on it, but if it is non then I don;t need any.