I can't tell you what formation to use since I don;t know your squad (you just posted a list of names, I can see their stats or PPM's) so all I can really do is give you basic advice.
Formation: Look at your players PPM's and build your tactic around what your players do. Try not to overload your Player instructions or Team instructions. My philosophy is "If you need to tell them everyday, you're not doing enough in training."
Be thinking of where players will position themselves and how your Player instructions, Team instructions and PPIs will then disrupt that shape. Plan formations around what your players will do and try to let them play their game. Otherwise you'll get disjointed performances and consistency issues as you're asking players to play a game that's not their style.
Try to develop a core base of players and train them to play the way you want, that way you can only use Team Instructions for basic ideas and shapes.