Survey! Don't pass by! (Arma 3)

Hello! I am conducting a survey, please answer in detail which companies and missions do you consider the best and recommend for passing. I'll create a guide on steam so everyone knows when there's nothing to play. Be sure to indicate whether it is possible to play in coop mode (and by the way, how did you check it or not, in general, in more detail), and also ALWAYS write about the historicity and reality of what is happening. I will also be happy with missions from other universes, for example, Star, Wahi, Stalker, DayZ, and so on.

All the peaceful sky above your head!