The final gameweek of the Fantasy Premier League season is always chaos. Teams with nothing left to lose suddenly play with freedom, while motivated teams and players chasing Europe and personal milestones feel heavy with the weight of expectation. It is also the perfect time to back differentials. The managers who make huge gains on the final day are usually the ones willing to back low-owned players capable of delivering double-digit hauls.So here are my best differentials to target for the final gameweek of the FPL season.Richarlison vs Everton (H) Few narratives feel more fitting for the final day than Richarlison (£6.4m) facing his former club Everton. The Brazilian thrives on emotion, and this fixture looks set for a big points haul. Still not safe from relegation, Spurs will see this as a must-win game. While a draw will be enough, if they lose and West Ham beat Leeds United, they will go down. Richarlison has form for keeping his side up in May… just ask his next opponent (Emma Simpson/Everton FC via Getty Images)More importantly, from an FPL perspective, Richarlison has quietly become one of Spurs’ most potent attacking threats. With Dominic Solanke (£7.1m) out injured, Richarlison is set to continue to start as the No 9. He has played 90 minutes in the last three and scored twice. Everton have often struggled away from home and actually rank in the bottom four for xGC (expected goals conceded; 55.1), so they do give up chances. Richarlison is also likely to be on penalties with Mohamed Kudus (£6.4m) and Xavi Simons (£6.4m) out injured. He is exactly the kind of high-variance pick that can swing rank dramatically. He is owned by only six per cent of managers at the time of writing. Morgan Gibbs-White vs Bournemouth (H) Morgan Gibbs-White (£7.5m) has had a very impressive season and netted 14 goals with four assists. When Nottingham Forest play well, Gibbs-White is usually at the centre of everything. He creates chances and has stepped it up in the goals department.