After that i changed projectile syntax and copied it from tank cannon-shell. Good, projectiles become non-target and fly single direction. But another problem appears, i ll try to illustrate it. 1st image shows laser turrets, they works as usually (no artillery built).

2nd image shows the problem: when i place artillery turrets on map - laser turrets start to ignore some enemies (red circles), who comes too close. But they are still shooting enemies in further distance.

I have a proposal that laser turrets "think" that these closest enemies will be killed by artillery (cause turrets know how many projectiles they need to shoot to kill all enemies within attack range and dont make extra shots). I ll be glad to hear any ideas to solve this. Sorry for my english)