I've been playing an Arsenal save as well, and just finishing my first season. My advice for your striker replacement would be Seydou Doumbia. He has been phenominal for me, RvP has struggled with fitness all season and has kept picking up little knocks which rule him out for a few weks at a time. Doumbia has scored over 30 in all competitions this season up front with my other big summer signing, Cavani. Keep up the good work, really good story!