Tried the team above for 18 games and it didn't work out at all. 4-2-3-1 really disappointed me. It's probably a good formation and it must be said that it's probably the best formation defensively I've tried so far, but I just didn't create nearly as many chances as I do with the 4-3-2-1. So I made some alterations to my team and I'm now using this:
It has worked wonders so far. I've tried it out for a few games and won every game comfortably in div 1. As some of you may recall I have praised Perin a lot before, saying he's as good as De Gea, and then he suddenly got rubbish for me in the end of my last 4-3-2-1 spell. Gave him a second chance now since IF Handanovic was awful and played him for a while with the cat chemistry style. He was better but not anything special. Put a wall chemistry style on him not long ago and he's back to the level he was for me before. What a fecking goalkeeper he is. Having someone between the posts you can trust actually affects how you defend. That defense plus him (and Ronaldo) makes me feel invincible at the moment, can't wait for the weekend.
TL;DR:
1. Buy Perin. If he doesn't fit in your team then change it
2. Put a wall chemistry style on him
3. ???
4. Profit