So ancient scrolls are currently in-game for weapons, but not armor. I suggest adding ancient defense scrolls for armor. Then adding a chance to gain a random perk from a successful ancient scroll being applied to your armor / weapons, but each piece of armor / weapon can only have up to 2 perks.
Some of these perks on weapons could be a greed bonus that would give you slightly more coins from killing monsters (about 1.2x coin drops), or a bleed bonus that has a 30% chance to cause your enemy to bleed over time in total dealing an additional 10% of the damage you did with the attack that caused the bleeding, but its cancelled by using the regeneration ability or any healing potions.
Some of the armor perks could be a stamina recovery bonus that makes you recover stamina 70% faster, or random stat bonuses such as +3 vit, str, int, or dex.
Maybe they could just let you use the current ancient scroll on armor and weapons instead of making an entirely seperate one for armor. (I know it would be different from how the other scrolls are, but it would make it less annoying when you get a super rare scroll that already has a low probability of working only to find out its for weapons when you needed one for armor, or vice versa.)