I wonder how it would go if you spread your TIEs across the board with the intention of gather mid-field. You're not starting together, but you're moving into a central formation, and then breaking off. Something like:
/_____|_____|_____|_____\ with each vertical line denoting a ship in your squad.
The key would be understanding speed(both you and your opponent), making sure you clump at the right time to hit, but not be struck back while clustered.
As soon as you expect howlrunner to only affect a couple of ties, you should move to the 8 ties swarm I think.
It has no issues with spreading out (outside of firepower dilution) and has more bodies to soak up missiles.
Starting with Bohrdumb initial formation, you can reduce the splash damage on the alpha strike, then close ranks at close quarters.
Usually I found that I usually want to approach ennemy ships at an angle anyway.
Both of these are good points, but it's important to remember that Blount isn't the only thing out there, so your squad still needs to be strong against the same old things. Can an 8-TIE swarm defeat 4 B-wings with Adv. Sensors? I feel in that situation you'd still want the higher PS pilots so you're not eating all their 3-dice attacks every round. And you can't barrel roll out of arcs because they'll barrel roll to get you right back in their sights.
What if you intentionally split Howlrunner as your flanker? She's still a PS 8 TIE fighter pilot, so it's not like her points are totally wasted.