The best is the most flexible by far:
4x academy pilots
4x obsidian pilots
Most howlrunner swarms are easy to exploit once you are better at the game.
I like running my 7 ship Howlrunner as 3 entities: 2 with HwR, and 2 pairs of Wingmen on either side.
I can still bunch up for power, but after Swarming against a 5-Assault + Failsafe fleet, I've learned to get some autonomy.
