I would also recommend having decent bench players if your main players don't have very high Stamina. I like to keep a well balanced, salary efficient roster. I agree with the bit about the arena. I think around 9k is enough to get into D-4, and you can expand in D-4 from there. I also dislike very old players. The skill drops are terrible, and because of the skill drops, they usually have inflated salaries. So when you have old veterans on your team, you're paying too much money for too little talent. I like keeping my important players under 30, though that is sometimes hard to maintain.