i toyed with this idea awhile back, in the form of a missile that would deploy a number of slow, but harmless bomblets (no scripting required). the idea was they would overwhelm the point defense of the target. it didnt work too well. they would all die too fast, or you would need so many the game would slow up. newer features like weapon hitpoints or an armor nerf would make them work a little better. only thing i can really think of code wise you would need a general feature to give weapons target priority so that point defences will prefer to target weapons with the highest priority value. that and to get the ai to use them.