Karch Kiraly of USA Volleyball explains that hitters are most valuable when they are "easy to set," or are adaptable to the set, even if it's imprecise.
The most critical aspect of being an adaptable hitter is to come at the ball from an angle: not too wide, not too deep, not too straight on. The player's torso should always face the court so they are open to the ball trajectory and aware of the court and what's happening during the play. If your outside hitter is left-handed, they should come in slightly closer to the court. The hitter should be relaxed, poised to make a powerful approach, and always tuned to the setter's positioning.