Maximize the Bow (excluding Arrow Width 2 to keep accuracy against Laser Raptors), Aim Time, and 1 Clone.
Side-swing attacks combined with a jetpack are effective for quickly slicing through their defenses. A guide for endless mode - Steam Community Clone Drone in the Danger Zone by sets
Prioritize defense against increasing projectiles. Fully upgrade Block Projectiles . Maximize the Bow (excluding Arrow Width 2 to