I didn't look up the info on the imbued ruby rings until after a chanter and I had made one.
If you want imbued ruby rings, stick with the silver one. If you have a pair of them you only have -2 agility, but get +8 strength, +8 wis, and +2 stamina.
Most of the imbued rings aren't worth making from what I saw of the stats. Just stick with non-imbued gems and you are better off.
With less fuss, making this ring without imbuing it, you get +4 str, +2 wis for each one, and no negatives.
Scalldon Macebender,
30lvl cleric of Brell
Veeshan server.