Wow. Editing Fan of Knives is cool. You can change the number of maximum targets and it will pick the closest units (I think). The way you need to control the behavior is by setting Maximum Target to some number... But then, in the max damage field, this must equal (Max Target Number * Damage Per Target) in order for it to fire the right number of projectiles. Some other iffy behavior is if you have the max damage larger than this value, then some damage actually splashes over into other units. The splash damage appeared to affect nearby units, so you might actually want this functionality. Actually, I tested it again, and it will only ever hit a unit next to the actually target without making a projectile to this secondary target, however.
This is a little tl;dr, this is the only important part:
If max target is 1, damage per target is 75, but max damage is 149, it hits one unit and a secondary unit without a projectile. If you make the max damage 150, it will create two projectiles and hit two units. But then, it can actually spread the damage across 3 units but 2 projectiles... It's strange. | 
