Strategies

Timing Your Attacks
When you're first learning the game, all of the different options can be confusing, and you may find that a lot of time goes by without you completing an attack or fielding any champions. This can happen when you're waiting for an exercise to be ready, or when you've run out of energy and can't deploy any champions. It can be helpful to first quickly decide which type of exercise you want to do, then make the selection in the machine, and while the machine is getting ready for your exercise, you can use that time to deploy champions. You should have time to deploy one and sometimes two champions. By the time they're deployed, your exercise should be ready, and you can aid your champions with your attacks, as well as build up more energy to deploy more champions while the machine readies your next exercise. This should give a more consistent flow of champions and attacks.

Building Momentum
Momentum can be a powerful ally in the arena. Sometimes it is best to save energy until you can field several units at once. This is especially important when using weaker ranged or offensive champions. Save your energy, kill off his champions using exercises to gain more energy, then field a few units to absorb damage and a few units to deal heavy damage. Tanks like Rock Dude or all around units like Aquafist or Sheara are excellent at absorbing damage, and then follow them up with a Firebird, Skadi, or to take down walls or crystals quickly you can use multiple Lightning Tigers. Without building momentum in this way, you may always find yourself playing defense, just trying to keep him from taking down your base without getting much chance to take down the opponent's base.