It's pretty simple, if the ban don't stay in place:
Buy a striker, Tammy and Giroud as replacements and get rid of the rest of our strikers
Ban stays in place:
Buy Higuain, extend Giroud and let those battle it out with Abraham. Personally I actually think Abraham is capable of being our nr 1 striker, but you can't gamble on that so in this case we should definitely sign Higuain.