Target Calling

When in a party it is almost always advisable to designate one single person as target caller, with the rest of the front-line and damage dealing mid-line characters following that person’s calls.

From Wiki

Target Calling

When a player calls his attack on an opponent, that opponent will become the party’s priority target, and the foe’s location will be automatically pinged red. Players can acquire the same target by pressing the “Targeting: Priority Target” hot-key (“T” by default), or by clicking the bright red icon that appears next to the caller’s name in the party window.

If a second player calls a target, it overrides the prior priority target, though the prior remains visible for a time as a dark red icon by the party window.

Henchmen and heroes will instantly engage any priority target that is in range. This is very useful for weaker characters as they can send the henchmen / heroes in first. Henchmen and heroes will also switch targets if a new priority target is called if already engaged.

Targets should be called depending on what most affects the party’s chance of successfully destroying an enemy group (without, of course, being destroyed yourselves). More often than not, these are the enemy monks, as they can keep the rest of their group from dying. Therefore the normal target calling sequence is: Monks => midline => melee. If possible, the target caller should be an experienced player.

If everyone is calling targets the hero’s and henchman are just running all over the place and not do any damage.