The Scythe in Helldivers 2 is a highly practical and powerful laser-type weapon. It can apply fire rapidly to many enemies, but you need to manage your firing rhythm to save on heat sinks. To make it more effective, a good modification setup is recommended, with Right Angle + High Capacity being a top choice.
Best Modifications for the Scythe in Helldivers 2
Scythe
Right Angle + High Capacity
It performs well against mindless hordes (Southern Front) and on the Eastern Front. Heat dissipation speed is less important than capacity.
Unlimited ammo and strong fire application, but the direct damage is too low.
On the Eastern Front, it's best to improve your anti-Commander capabilities, as this weapon struggles against Commanders.
It's quite average on the Western Front.
Low penetration makes it difficult to trigger multi-limb stacking and fire application on the Eastern Front. Even if applied, it's not very effective. It's better to just slowly melt enemies' heads.