There are a lot of reasons to favour Aubameyang
first, his versatility allows us to really mix things up. we can play him either side of Giroud when we throw the big man on as a Plan B; and we can normally use him down the middle
second, his speed is fabulous. he'd eat up through ball from Ozil, Cazorla and Xhaka.
finally, i like that even though he isn't a power player, he's still larger than most of our team at 6'2". Sanchez, Iwobi and Aubameyang running at defenders with Ozil behind them? Yes!!