To follow off of this, Mythical Olexra’s Chill, while not entirely useless per se, just doesn’t really make a lot of sense, whether you’re going for an ABB build with or without cooldown.
There are no offhands with ABB modifiers and only one offhand with any sort of bonus to ABB (Sphere of Many Blades) so it’s likely you’ll be better off dual-wielding. That already hampers a cd-based ABB since you won’t be getting much cooldown reduction without an offhand and Olexra’s Chill is the only one-handed item with flat -cd for ABB.
If you’re going for a spam build, you have to use Amarastan Crusher and then you can use Olexra’s Chill for the conversion. Nice. Issue is, Amarastan Crusher deals physical damage and you don’t have a way to convert that to cold to fit the build, so you’ll likely want to use Olexra’s Chill as your attacking weapon (since ABB only attacks with the left hand if dual-wielding). Then you get the base cold WD you’re looking for…except Olexra’s Chill has no attack speed on it.
So you have bad cooldowns if you’re going for a cd-based build and bad attack speed if you’re going for a spam build with this thing. I know the build is kind of a meme but it doesn’t have to be that much of a meme. Adding like 15 % AS to Mythical Olexra’s Chill wouldn’t break anything.