You're outmatched in a straight burst race - Fear the Rogue on his opener and bubble the Warrior through the follow-up.
Kiting casters can stall your melee indefinitely - Fear the healer specifically to create windows for the Warrior to close.
This is a slow grind - out-DoT their sustain over time rather than trying to force a fast trade.
A slow attrition mirror - whoever lands Fear on the enemy Warlock first usually builds the DoT edge that decides it.