I consider 2 HB on an Aurora mandatory because it gives fairly decent DPS while saving the other mounts for missiles and costing very few OP. Its true that the HB is more an armor cracker than a shield cracker because of its poor efficiency, but the Aurora can support two of them well enough. The ship is a little vulnerable to Remnants because it doesn't have any kinetics, but it is fast enough to mitigate that somewhat.
Every mount on an Aurora that can mount a missile should mount a missile, other than some specialized SO builds that can run triple HB (and not much else). And it should have extended racks. The AI is good enough with them when it is set to aggressive or reckless.
Consider it this way: I can build an 1100 flux dissipation warship with moderately more efficient weapons that will be a little bit better against shields and a lot worse against armor and hull (Pulse lasers are very bad against cruiser grade armor and IR pulse will be doing minimum damage), that has some missiles. Or I can build an 1100 flux dissipation warship a little worse against shields, much better against armor and hull, and that has a large and deadly missile package.