The Bairns made their fifth signing of the window on Monday when they added winger Callumn Morrison. Now, the Falkirk management team are setting their sights on someone to come in and challenge Robbie Mutch for the number 1 jersey.
Speaking to the Falkirk Herald, Miller said: “We’re probably about three away from having the right numbers and balance.
“We’re happy with what we’ve done so far but still a few away from being satisfied.
“We need that goalkeeper to challenge Robbie, that’s a must at this stage.
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“We also probably need another centre half although we do have players who can cover that, then an attacking midfielder.
“Keepers are hard to come by right now and we need to get the right type of player in.”
In the meantime, Miller says he is looking forward to the directness that new signing Callumn Morrison will bring to the team and says his pre-existing relationship with striker Aidan Keena will go a long way.
“His directness is something we’re excited about and he has the experience form benign at Hearts and the quality in the final third.
“For a full back facing Callumn, like we did last season when he was at East Fife, it scares you and hopefully we can utilise him in that way.
“It’s definitely a great head start the relationship with Aidan and they get on well off the pitch.
“He’s a winger that can get to the byline and Keena thrives on that, them knowing each others game can benefit us in the long run.
“Callumn is the right type of player we want to develop and move forward with.
“It’s not just about any young players coming in, it’s about players who have a point to prove.”