The main spot you need is backup right back.
The players I bought in one of my saves were:
- Milan Badelj 4,1m MC Dinamo
- Sime Vrsaljko 3m DR Dinamo
- Andile Jali 350k DM/MC Some south african team
Then only promote Ryo, Ox and Coquelin to first team and you are good enought to win Prem.
Sell: Almunia 2m , Vito Mannone 1,5m , Sebastian Squillaci on january for what you can get for him, Diaby the same as Squillaci.
I preferred to use one forward. RVP the main and Chamakh as backup cos in FM Chamakh does really well. RVP was injured quite a lot and Chamakh scored almost 30 goals in a season. After that I sold him for over 20m.
Also If you think you need a new GK to play with Woj then look at Kameni for 5,25m release clause.