The players that i always take a look if i want direct impact are:
Arbeloa 7mil / diam? 3mil / Damiao 7-8 mill / Honda / Koke / Anderson is always transferlisted / Kirkchof from bayern loan / Benayoun free player / candreva 10 mil / Somethimes fletcher in winter / free transfer lewandowski in summer but need winter contract ore 20 mil
It are not worldstars but decent players with a good team setup you can win everything..