This event can be nasty, creating horrible turns for your opponent, often thanks to Guild Gunner or Out of Shadows, you can put a unit (even a champion) in the middle of the enemy frontline, and then use Smoke Bomb to nullify your opponent's turn.  So often a must-use event as it is so capable for Cloaks in shutting down opponent effectiveness. Remember, if you just manage to prevent a single attack from your opponent, and force your opponent to only do 2 attacks, it is already worth it.
Smoke Bomb is also a great tool to protect your units that have Moto Boots and Hand Cannons, which will otherwise be priority targets for your opponent.