A fun little tidbit for making the most out of that first transfer window budget. Go after some old guys!
For me fixing the defense was my #1 priority, after transferring a few people out, I brought in Manolas and Rugani to sure up my CB's, then Toni Lato to back up Shaw and promoted Tyrell Warren to learn from and back up Darmian.
Left me with very little to improve my attack. But a FREE transfer to back up your offense is Ronaldinho. His physicals aren't great at all, but his mental and Technicals are immense! I brought him in as back up for the CAM position in case of emergency, but more specifically to tutor Angel Gomes, who is also in the rotation for CAM. He's only available for a 9 month, ~$1m contract. Doesn't have a great expectation to play.
I recently had my emergency, with Mata and Herrera both injured and out for 2 and 4 months respectively. Gave Ronaldinho his first start, handled 90 mins, with 2 assists, 8.5 rating.
I tried to do the same with Drogba, but he was set on seeing out his contract and retiring.