I'm playing through the Darkening in Mirkwood and, as a LM, I created Famous Weapons and Armour to my players, and one of them got the gandalf + double 6 to get it! I was pretty happy that it finally happened, but I think I unbalanced some mecanics, especially the Parry.
Here's the context: he's a Woodmen with 6 parry plus +4 from great shield (which was the treasure discovered) and +3 if he fights in the forest (which happens often as the name of the adventure sugests). So far he's got 13 Parry, but the qualities of the shield give +1 (Reinforced) and +3 if he chooses to spend 1 point of Hope per combat (Rune-scored Shield). If you add the Hound of Mirkwood, that makes the closest enemy Weary, he can literally solokill a Hill-Troll, because he will only get hit when the enemy roll a Sauron rune.
I would like to keep the idea of boosting one especific attribute with the treasure, but this one have gone too far. I would appreciate any sugestions about how to handle with this situation? Change the object? Change its qualities

Thank you so much for the attetion!