Well... now we need a striker and there is no arguing with that. My guess is he will look for a loan as I doubt he has a particular target ready and, let's be honest, who sells a top class striker in January?
I wouldn't bank on seeing Saka for a while, or on what he will look like when he is back. So yeah, I think he has to do something.
I have no advice to offer. I don't know what he should do. But it must be something.