I've been wanting to try a doctrine where missile waves have 3 layers; first armoured ECM missiles, next pure armour slugs, and last as many waves of standard ASMs as seem necessary. The theory is that all 3 have the same basic speed, so the targets should see the slug wave first, and start expending AMMs, then see the ECM equipped slugs pop up, and suddenly switch targets to counter the new "threat", all of which should (hopefully) allow the real ASMs a relatively quiet run in, as the armour soaks up all the hits. Of course, this suffers from the same limitations as any missile doctrine, overwhelming PD of any sort makes the composition of the wave irrelevant.
For a relatively balanced fight though, it should allow the first few waves of ASMs to get to roll to hit their targets, at least. Whether they score damage is perhaps another matter