Third option: Left Winger in a 4-4-3
As we briefly introduced on point one, Lacazette can also play as top forward.
Leaving him in the middle can make Arsenal a little bit more defensive as in the 4-4-2.
However, having Pepe and Aubameyang on the 2 sides can give them the freedom to use the space better in the attacking phase.
It should be a very good system especially against teams with a side backs taking a high and aggressive position or against teams that hold the ball longer than Arsenal, like Manchester City.