[Vision Of The Absolute] and [The Sparky Points] are exactly the same in terms of stats yet different rarities
This seems apropriate. O_o
Since
[Vision Of The Absolute] have chance on hit to Blind your enemies (wich for some unknown reason is still hidden in tooltip, unless i remember it incorectly?) ...
Plus it gives massive special damage to "enemies with more eyes" (or something like that), wich is really bugy or unfortunate description, since last time i tryed it didnt work on spiders, or ettercaps ... wich most certainly DO have more than one pair of eyes.
But
[The Sparky Points] gives you +1 to hit and +1 to damage, wich can change to 1d8 instead, if you have enough charges. Wich is certainly quite different effect than "just change to blind" (or other way around, depending on your prefferences) ...
Plus and this is that important part, it have prepared synergy with other "lightning charged" items ...
I mean, it seems quite logical to me that spear that requires you to also have boots, gloves, chest, neckage, shield and helmet ... in order to unlock its full potential ...
Will be a little more rare than spear that can just poke someone's eye out.

a unique ability and better than both
I agree that this mace is better (obviously only if you are profficient, otherwise its completely useless

).
Not quite sure how that enchantment works tho, if only profficient person can use it ... is it even enchantment? O_o
But i wouldnt go this way in order to pick any rarity, since deciding "better" is very subjective ... there are people theese days that are still sure that
[Everburn Blade] is best 2H weapon in the game. O_o
Same with other items such as [Everburn Blade] being the same rarity as [Greatsword +1].
[Firestoker] being the same rarity as [Hand Crossbow +1].
This also seems apropriate ...
Maybe im reading something wrong ...
But it allways seemed to me like
[Everburn Blade] is just some kind of "standard Avernus General Weapon".
So Uncommon would be exactly what i would pick.
And +1 weapons are offered to you by first Vendor you meet ... a Blacksmith, whos workshop is (to quote the game itself) "holding together by a threat" ... so as it seems, also nothing too extra special.
Same with
[Firestoker] ... i dont really know if that is supposed to be some extra special prototype weapon, but i thought its just some standard equipment of Sharan warriors.
Something that was quite common in its days, but as time goes it was less and less of those around ... but also not so little for them to become Rare.
[Sword Of Justice] being the same rarity as [Greatsword +2].
This seems like a gues ...
As far as i know, there is only one +2 weapon in game, and that is Broken Flail we get from Flint (or how is that Gnoll pack leader named).
Unique items with unique properties that make character builds more varied should simply be unique rarity.
100% agree ...
IF they indeed are supposed to be unique in the WORLD, not just game.
I think this would be best seen with
[Everburn Blade].
If Larian indeed intended to be the one-and-only
[Everburn Blade] in the world, and nobody ever had any other ... then indeed, Unique it is and Unique it should be.
On the other hand, if my hypotesis is true (as i obviously presume it is) and
[Everburn Blade] is just some random generic weapon Demon Generals are using ... then, logicaly it should have different rarity.
I mean, if we mark everything that isnt just generic +X as Unique ... that mark itself loose its purpose.
