Finding an early copy of Olaf is the most likely reason to force this comp. Make sure you play him alone in the frontline during the early game to make him stack AD from his passive with each death. Level up to 4 at stage 2-1.
You'll start rolling at level 7 so you should start to find your remaining Scalescorns. All of these should get to 2 star pretty fast once you do roll. Level up to 6 at stage 3-2.