Friends has 1 Flacon with Chewie and 4 B-Wings.

150Pts.

How do ye Imperials fight that?

Those B-wings are beasts. Like A-10 Warthogs.

That list has a load of sheidls to get thru before you can start damaging them.

I would suggest plasma torps. A plasma torp shot with re-rolls or focus will usually take down 4 shields off a B - which is half of its health. That makes for a horrifying alpha strike.

An extreme example:

3xGamma bomber, extra munitions, plasma torps

Jonus, extra munitions, plasma torps

3 academy pilots

Howlrunner

Swarm it, silly.
He's bringin' 5 ships worth of can't-dodge.

You can bring 12 TIE Fighters, one of whom is Howlrunner.

A variation on the above mentioned Bomber list is Assault Missiles and Proton Bombs. B's can't Dodge worth squat, so take advantage of that. If the opponent likes to "swarm", the Assault missiles will yield a lot of splash damage. The Proton Bombs will avoid the Shield issue altogether.