This build is made to play with Vikings togheter. You will split them on the same lane to avoid great AOE Damage. Basically you will need to use button 4 to send them atack, then select 1 (Olaf) and just control him for a while, until it comes to low health, then run with him, until the other 2 guys keep dealing damage. As soon u recover Olaf, you will rotate them, always keep 2 of them dealing damage and other one, runing or distracting enemies and merceneries. Continue next days...