#2 Sign a wide forward like Lorenzo Insigne
If you look at great title-winning sides of the past, they all had firing attacking options on all fronts. Great teams don't just rely on a striker, they have two supporting wide players chipping in goals too.
Arsenal don't have that at the moment as they're missing a competent goal-scoring left winger. Alex Iwobi has played the majority of the season and he's scored a woeful 3 goals in 24 Premier League games.
With Alexis Sánchez through the middle, Theo Walcott on the right and Lorenzo Insigne on the left, there's not one defence in the league that could handle such an attack. The 24-year old Italian has been in scintillating form this season, scoring 12 goals and assisting 7 in the league.
He's a player that links up well with others, shoots on sight and is exceptional at holding up the ball. Insigne would perfectly compliment & improve the current personnel of Arsenal.