Ok, let's change the question a bit, what Rebel ship will end up getting 4 attack dice to balance this situation out?
I'm not sure this game needs to follow that logic (even though the YT-2400 did get the HLC turret option for 4 dice round the clock shooting). The Phantom can already be countered by a load of rebel options so balance already exists. ForceM listed several options a few posts up and there's always defaulting to turrets.

