I think in order to dominate, you have to change the way you manage your teams as you level up. I believe first levels there will be lots of bots or unattended teams due to people losing interest in the game, or it just makes you hooked to the game at the start by making you win. But as you level up, there will be more competitive players who are active, and want to win. So you have to change your management tactics.

Thats what I found to keep up with the better teams.

REMEMBER, you can still win without purchasing tokens with real CASH.