A free mod for Final Fantasy XIV, by ioverslept.
This mod will swap every single scythe in the game with an equivalent version of the blade. So for example, a scythe with the model name Sickle of the Round will be replaced with Claymore of the Round, which has the same name and model. Some of the scythes are the same, so unfortunately they will have the same greatsword model and texture.
The mod also changes the RPR idle animation to the GNB idle animation and the RPR pose to the DRK male pose for all races and genders. It is a separate file, so if you want to keep the Reaper Idles you can simply not install it, they work fine as well, except maybe for the pose.
The animation swap file works relatively well with the scythes so you can experiment see if you like it.