Probably can only carry a few HARMs and might as well carry as much fuel as possible in order to stick around until some one feels froggy.
Things a pilot never wants to pass up: runway behind you, altitude above you, and gas you coulda had.
In addition, external fuel tanks are great bc you can carry them, use the gas, and come home OR carry them and use the gas until things go sour, then discard if necessary and rage.
OMP