I don't do tests and stuff. I know how good my team is and can be. Remeber, good management adds like 50% to your team's performance, regardless of skills.
Last season I was in a league full of bots, and so took the opportunity to grasp the concepts of the game. I decided when this season started that I wouldn't focus on winning (Heck, I can beat every team in my league if I went in full strength each time), but instead use this season to develop my team and experiment. In that case, it has been a success. All my seamers have opened the bowling now and then, I've tried a few different pitches, different batting lineups and orders, and have given nearly everyone in my team a bowl! I already have my training planned out for the next season, and am not expecting to promote (Unless a few upsets take place...) and to stay in this league next season. Not sure if my opponents will be stronger or weaker though.