Arsene Wenger says the instinctive understanding between old friends Pierre-Emerick Aubameyang and Henrikh Mkhitaryan can transform Arsenal’s turbulent season. Aubameyang marked his Arsenal debut with a goal in Saturday’s 5-1 demolition of Everton, while Mkhitaryan provided three assists in his first start for the Gunners. The swaggering show from the former Borussia Dortmund team-mates was a…