First give me a centre-back pairing that are robust enough to play together week in week out. They don't have to be world class, just competent and robust enough to form a steady partnership over time.
Until we have a decent CB pairing, I can't see any goalie succeeding in our team. However, I don't see anything about our two keepers to suggest they will ever be part of a winning unit, so let them go and buy the best we can afford and bring back Ward - Oh, and if the new keeper think the goalie coach is shite - bin him off too.
Then we need a left back that is first and foremost a defender with the pace to get up and down the flank to add support. Milner has certainly done a job, but he had a massive slump around January and the lad is not getting any younger. I'd also question some of his positioning - though to be fair, I think he sometimes feels the need to defend a bit narrow through lack of confidence in the CBs.
Next for me is a DM. Someone that can actually break up attacks, help defend set pieces and doesn't give away senseless free kicks.
The hardest part I think, is finding players with the quality to at least challenge the forward options we already have. Recruits need to be happy to bide their time and step in - or attempt to make a position their own. We have to be able to replace like for like though to have a winning squad.
Finally, get shut of Studge and buy a new spear-head. Someone that works as hard as Firmino but with more end product. Firmino has to stay to provide cover and option as do Ings (I'd like to see him get a chance if he ever gets fit) and Origi (still got bags of potential)
The only players I'd let go are the keepers, Studge, Ragnar, Alberto and Lucas and possibly but not necessarily Sakho. I don't think we are a million miles away from winning things. Our first team -on song- are enough for anyone, we just need a higher quality of cover and a more steady, consistent defensive unit.