After making lots of bracers and comparing them I came to conclusion that their stats need some balancing. Some of the bracers are better and some are worse in comparison.
Hopefully other players will share their experience and how things work for them. I'll post some of my thoughts, although it's not a full list of available changes. The main concern for me is skill bonus and type of spell.
Skills: Only one and relatively useless skill.Adamantine Bracer of Avoidance
Damage Reduction: 5/+3
Enhancement Bonus: +2 Dexterity
Skill Bonus: +6 Parry
4 use/day Shield(5)
Spell: Good spell. Will be used often by many different characters.
Skills: Amazing skill bonus, used by all charactersAdamantine Bracer of Preservation
Damage Reduction: 5/+3
Enhancement Bonus: +2 Wisdom
Skill Bonus: +6 Heal
4 use/day Lesser Restoration
Spell: Very useful spell, will be used by majority of characters.
In my mind this is the best bracer from current selection. Great skill/spell combination and can be runed by just Greater Rune. I've been seriously thinking about runing it and using on STR based character, for Heal bonus and somewhat useful +1 Will. It's kinda extreme, but I think it's a good example how good this one is.
Skills: Let's face it, nobody uses "social" skill rolls. Maybe it will change in the future, but right now it's just wasted property. Taunt is useful, but only for a small part of characters. So, both skills are useless for the majority of players. Unlike previous bracer, it requires Masterwork Rune.Adamantine Bracer of Aggression
Damage Reduction: 5/+3
Enhancement Bonus: +2 Strength
Skill Bonus: +5 Intimidate
Skill Bonus: +5 Taunt
4 use/day Expeditious Retreat(5)
Spell: The spell is good, but duration of 5 rounds completely kills it. You can't really get far, even using all 4 charges. I suggest changing it to Level 15, or replacing with Haste (5).
Skills: Very good skills, useful for most characters.Adamantine Bracer of Knowing
Damage Reduction: 5/+3
Enhancement Bonus: +2 Intelligence
Skill Bonus: +6 Lore
Skill Bonus: +6 Search
4 use/day Identify(3)
Spell: Good spell, but it may be kind of overkill having INT based character, Lore skill bonus AND Identify. Please, if you're using this bracer, leave your feedback.
Skills: Perform is somewhat useful, Persuade and Bluff completely useless now.Adamantine Bracer of Persuasion
Damage Reduction: 5/+3
Enhancement Bonus: +2 Charisma
Skill Bonus: +6 Bluff
Skill Bonus: +6 Perform
Skill Bonus: +6 Persuade
3 use/day Charm Person(10)
Spell: Need player feedback here. Did you find this spell useful in practice?
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Overall I think that putting one useful skill, instead of three useless, would be welcomed by most players. It will also create opportunity to use Greater Rune instead of Masterwork, which is a big deal, of course.