Even as the dust was starting to settle on Wrexham’s ultimately unsuccessful pursuit of the play-offs, Phil Parkinson was unequivocal in his belief that a highest-ever league position was only the beginning for the club.“There’s so much to be positive about going forward,” he said in the wake of the final day draw with Middlesbrough that ended those dreams of a fourth straight promotion.“The new stand, the academy, things are only just starting. This squad, as it stands and with a pre-season together, will be stronger next year. We know where we’d like to strengthen and what we need to improve on. We will do that and make this squad as strong as we possibly can to mount a challenge next year.”As Parkinson rightly pointed out after the 2-2 draw with Middlesbrough, the Welsh club will benefit from having a strong base to work from. Proven performers such as Josh Windass, Ben Sheaf, Dominic Hyam, Callum Doyle and Kieffer Moore would walk into most Championship starting XIs, even allowing for how the latter will be 34 when next season kicks off.Wrexham, though, need more. Even when displaying their best form of the season from Christmas onwards, a points haul of 43 from 24 games was still only the sixth highest in the division.Quality additions are needed to supplement the undoubted talent already at The Racecourse Ground. With that in mind, The Athletic has undertaken an audit of Parkinson’s squad to see where improvements need to be made.GoalkeepersSeventeen of Wrexham’s Championship peers conceded fewer than the 65 goals conceded by Arthur Okonkwo and Danny Ward last season, including relegated Oxford United.Not totally damning in itself, even when factoring in how 37 of those were conceded on home soil, a tally only hapless Sheffield Wednesday could ‘beat’. All manner of other factors contributed, including early teething problems in defence and how control of midfield was ceded at times to the opposition.However, once Opta’s more specific goalkeeping metric of ‘expected goals on target conceded’ (xGOT) is factored in, the picture painted is of a pair who did OK, but no more.Wrexham players mob Okonkwo after his FA Cup penalty save vs Nottingham Forest (Nick Potts/Getty Images)The 12 goals conceded by Ward pretty much tally with his xGOT of 12.82, while Okonkwo was beaten slightly more times (53) than his xGOT of 50.4 suggests should have been the case.Both champions Coventry City and runners-up Ipswich Town boasted keepers who over-performed their xGOT, in Carl Rushworth (conceded 45, xGOT 51.72) and Christian Walton (37, xGOT 42.55) respectively. Likewise, even the 65 goals let in by Ivor Pandur of play-offs victors Hull came on the back of 69.45 xGOT.Both Wrexham keepers had their moments. Particularly, Okonkwo, whose stoppage time saves in wins at Charlton Athletic and Millwall were of the very highest order.But, problems remain, and it is interesting that all three of the club’s senior keepers are about to enter the final year of their respective contracts, including Callum Burton.If Wrexham really are serious about making a concerted top two challenge, a goalkeeper capable of making important saves at key moments while also displaying consistently sound decision-making will be paramount.DefendersThe area of the squad where Wrexham seem most settled. Callum Doyle deservedly won Players’ Player of the Year, while Dominic Hyam also made a huge impact after joining on deadline day.