Congratulations. I also try to get the right strategy for the game. At the moment I buy cheap players and plan to do a big training session with several cool-down buys once my rooster is big enough. Than I may sell some of these players back to the market for a profit. Just an idea at the moment.
Interesting that the name of the player (Goalie or Offence) is not determinative for the setup. Attacker are quite more expensive than Dev and nobody looks that close in the statistics at the moment.