I like to come in to the furball at or above the fight, and fight till I die or I'm out of ammo or fuel. I don't usually make it back, but its fun.
It really depends, because if its all spits, f4us, etc.. I will scrap and get my hands dirty, if there are any Brewsters I will bnz until the Brewsters are gone. The reason, they mess up all my turn fights with other planes, ie if there are Brewsters around, the minute you get in a fight with any other ride, you will have a conga-line of them on your 6 that will chase you till your death, often I can't even dive away from them.