Mirror-ish comp swapping Warlock for Mage - land the first CC chain, since both sides otherwise trade fairly evenly.
Fear one healer to cut incoming heals in half before committing the Rogue's full burst window.
A very common ladder matchup - whoever lands Cheap Shot or Fear on the enemy DPS first usually decides the round.
Chase down the kiting Mage with Shadowstep/Fear rather than letting the fight turn into a long-range poke war.