I realised that there is no point investing in packs to get better player cards.
I am currently playing FC25, spent money on packs that guaranteed tots cards and I got few of them and put them in my team and played against AI opponent (Gold team) on world class difficulty, but I lost.
The AI opponent defenders are always catching up on my 94 rating players and managed to take away the ball. I also noticed that my high rating defenders (TOTS) cannot stop the AI attackers (Gold team).
The difficulty are poorly implemented that having high rating players cards in my team does not seem to make any differences. I regretted spending money on packs.
I am not a professional gamer, but the world class difficulty is simply not done well. Please make adjustment to the difficulty although I know that this request will probably be ignored.