Larian Studios Forums Divinity - Original Sin Divinity - Original Sin - General Buff character stats, nerf item stats.

+1 to [ability] items should be limited to one gear slot. Ex: You can get a Crafting belt, but you can't get a Crafting belt and Crafting gloves. Multiples (or any form of +ability on rings) does tend to lead to situations where "hard" character investment in an ability, especially a non-combat ability, tends to be a mistake. The crafted Tooth recipe, although fun and exploitable, is definitely a mistake; my Charisma characters don't even take Politician, because a single hard ability point, or two at most, is all you really need (and there are those on these forums who would argue you don't need it at all).

+Str, +Dex, and +Int should appear on accessories but never on weapons/armour/helmets/shields. +Con, +Spd, and +Per should appear on weapons/armour/helmets/shields but never on accessories.

This isn't to say I'm hugely dissatisfied with the way it is now. Actually, there might be some kind of game design art to letting players get away with things they shouldn't; it might be that always doing the right thing as a dev makes things no fun for the players. But if the goal is making things fair across the board, the recommendations above apply.