Death Sickle is cool and all, especially when you have an high melee speed armor such as hallowed, as it makes the sickles travel quite far before stopping on place. However, its max dps is not only situational, but it is not even comparable to Terra Blade and Horseman's Blade (on single target and considering all the sickles stick on it for all their duration along with hitting with the main weapon itself, Death Sickle would deal an average of 478.8 dps with no bonuses, while in the same conditions, Horseman's Blade deals 865,38 and Terra Blade deals 1072,5).