Not that it will happen often, but here is what this would look like if you put this in RANGE after already equipping your weps: http://img.photobucket.com/albums/v26/ErikVKing/SerratedDartofEnergy.jpg
For all item effects: click on the spell effect, then "Lucy spell view", then "stacking" and it will give you a list of buffs/debuffs that do not stack with that spell.
In this case, Savage Guard won't stack with the Dain ring effect, or Chromatic Chaos (from Sleeper's Tomb questy items.)