Puskas can survive the tots easily. I think the only upgrades,you can make is a new cdm (a bigger one with good defensive) and a new Cb for Cannavaro but this will come with the time!
Great team! Its very good in the current meta as well, and I can see u have had a considerable bit of packluck, keep uploading mate, you can be successful. And also.... is this f2p or have you spent money on this game?