Attacking
Keep control of the cannons to use to slowly chip away at an enemy base. Cannons will continuously fire at an opponent's base, as long as you have control over them. If you can control all three, they will charge up briefly before hitting your opponent for 10 points of damage. Try to make this happen as often as possible. Another way to deal damage is to lead your units directly into an enemy base. If they can make it in all the way, they deal damage directly to your opponent. The large and more costly the unit, the more damage they will inflict. When using this strategy, concentrate on one lane. Send enough units into the other lanes to keep them from being completely overrun, but always focus on a single central lane.
Spells
Do not rely too heavily on your spells. Although they have a low man cost, be careful. Use one or two spells to soften up your targets, but follow it up by deploying units.
Units
Each unit has a different move speed, health, and attack type. Learn how they function in order to synergize your units with each other. Before starting a match, you can purchase one of the three special units to bring with you for 30 gold. Consider purchasing one if it will work well with your strategy. The Colossus is a slow giant with lots of health. Although it does not attack very quickly, if it enters an enemy base it will do a lot of damage. The Legion is a small army. Deploying it will send out a legion troop on all three lanes, regardless of where the initial unit was positioned. Use this when split pushing. The Mana Sting is a mana-infused scorpion. It functions as a melee unit, however when it attacks it will generate mana.
