Core set. - second adventure

By mickcatron, in Strategy and deck-building

So I'm new to the game and I've played adventure 1 numerous times with different starter decks from core to get a feel for the game. I recently moved on to the second adventure ( the hill troll one) and I can't beat it with any of the starter decks solo and again tried with a friend co-op and still haven't beat it. So, what's the strategy do I need to star mixing characters or can this thing not be best with just core?