1. What patch do you used?
2. What area do you want to strength?
3. How much your transfer budget?
4. What type of player do you want to buy?
5. Try my tactic and post your line up.
If he is Liverpool i would not agree with this, obviously you need quality to mount a chanlenge for the league but Liverpool have the quality from the begining, ie. torres and gerrard. When i was liverpool my main problem was the lack of sqaud, i would be going al right when i had no injuries but when i had a few i was struggling to field a decent team. So my advice would be bring in a few players who are able to provide decent cover for you instead of wasting all your money on a star player and then not being able to buy anyone else and then you lose the league for not being able to rest and provide backup for your team.