The obvious area is defence and particularly full backs. If we could improve the bread and butter defence of our penalty box by even a modest amount, you could add 6 or 7, maybe 9 or 10 points onto our total this season straight away. That has to be the priority for recruitment and coaching efforts.
Making Vina permanent to replace Zemura looks a no-brainer. Apparently there's an option to buy. Do it.
I'd then consider moving Kelly to be more focused on LB (whilst still offering an option at CB) so as to provide us two very different LBs for different setups and situations.
At CB, what to do about Stephens? James Hill? In the remaining matches I'd like to see Zabarnyi and try to judge where he's at. There might to room for another CB if Kelly does move across longer term. Be that Stephens or a new face.
At RB, Smith needs to be our option off the bench. Smith needs to come on and use his experiance, take yellow cards for the team late on, win soft free kicks, time waste when needed etc. He shouldn't be starting every week next season. Jack Stacey's contract is up this summer I gather, we should probably release him unfortunately, to make room for a new signing here. Fredericks has another year, and is PL level if he can get fit? If Everton go down - Nathan Paterson would be an ambitious coup.
Midfield - a lot depends on Lerma. Sign the contract! He'll be a massive challenge to replace with his combination of attributes. Cook and Pearson can do elements of Lerma's remit but neither are as well rounded. Rothwell has been a revelation. Could Enzo Le Fee be tempted now that we've secured saftey? A competitor for Rothwell there.
Attacking midfield I'm pretty happy with the large array of options we have. I assume Stanislas is released. Marcondes?
Up front everyone in football wants a striker. It would be nice to find someone who can share the burden with Dom and potentially add a more clinical touch. I like Semenyo but he needs time, and is versatile. Moore might not quite make the PL grade, but hard to say as we never play to his strengths. Nicolas Jackson, or Championship Viktor Gyokeres or Joel Piroe are obvious targets.
Bear in mind we're already tight on the 25 and having to crowbar players out on loans, so the other side of the equation is who leaves.
4-5 signings, aiming for quality not quantity.