Rangers can still win promotion to the Scottish Premiership this season, but former striker Johnstone has told the Evening Times that the Gers must sign a consistent goalscoring striker before next term.
“Other teams have strikers scoring regularly but we don’t,” Johnstone said. “No matter what league we are in next season, that is something that has to change. We need someone who will get us 15-20 goals a season and someone that we can rely on.”
The Light Blues have five what could be considered as consistent goalscoring strikers in their ranks, although one of them, Haris Vuckic, is on loan from Newcastle United.
It is telling that Vuckic, who only arrived at the club in the January transfer window, is third highest scorer with seven strikes to his name in just 12 appearances.
It is that sort of consistency that Rangers need over a full campaign, and on current form, it is likely that Slovenian forward Vuckic would have reached the 20-goal mark if he was at Ibrox for the whole season.
Miller, at 34, is surely coming to the end of his career, and there are no guarantees that his contract will be extended past the end of this season, whilst Boyd is also 31-years-old.
Clark is an odd case, as he has netted so frequently in League One - including a 32 goals in 36 game season two years ago for Queen of the South - but he has never really kicked on this term.
At his young age he should not be written off, but he is not the forward you would want leading the line in the Premiership, having still to prove himself in the second tier.
The problem Johnstone highlights is certainly a very visible one, and Rangers will definitely need to fix this key weakness regardless of their league participation next term.