Thinking about it, the only way to truly bypass shields is shoot missiles where x = hull
That's 2 for ewings
3 for bs
4 for aggressors
5 for yt2400
The most you can get into a list is either five (5 protos or z-95 talas + vi cracken) or 6 (5 missile talks and 1 blount)
In those cases, you'll probably make people rue ever running bbbbz
Remember, you're not just gambling crits but also the tl requirement AND 3 points per shot. The only way to make it reliable IMO is spam
Eh...you forgetting about Extra Munitions?
You can put EM on a TIE Bomber to get four shots out of a single fighter. Makes, say, a Scimitar 24 pts (16 base + 2 for EM + 3 for each Adv Homer), so...heck, throw 'munitions failsafe' on it, too, for an even 25 and take four of them.
Not sure it's a GOOD list, but...you get 16 shots of Adv Homing Missiles, every single one guaranteed to hit.