You lose a burst race - Fear/Psychic Scream the moment the Rogue engages rather than trying to trade damage.
Similar DoT-heavy mirror - whoever lands Fear/CC on the enemy healer first usually swings the extended fight.
Two DoT-heavy teams - whoever lands Fear/Psychic Scream on the enemy healer first usually pulls ahead in this long grind.
This is a slow grind that favors your DoT uptime - avoid overextending into Warrior stuns while damage ticks.