Lots of people saying a striker, but in the Championship we play a system with one striker. We don't need someone this season to replace Armstrong as first choice.
Archer is good enough to be his back up.
We then have two issues.
Stewart is injury prone, but has the quality to be useful when fit. Which he is due to be again soon. I doubt they'll get rid of him in January.
Damion Downs has looked awful, but I doubt the club will give up on him yet.
So that is 4 strikers, for one spot. 3 of which are good enough. So no real need to sign another to bloat the squad.