After playing Guild Wars, I became reliant on calling targets for the rest of my team to attack. It makes everything much more organised and faster.

Say I am attack someone. I press the call target button and suddenly everyone can quickly switch to the target I have just called. That target dies much quicker. Then we move onto the next one. Everyone gets xp faster, we all have a great time. We go home for drinks later. Maybe you have a cocktail. I'm a lager man myself. We sit at a table, talk about things, you know deep things. I never noticed the way your hair glints in the light. It's actually quite lovely. A few drinks later, you're at my place and we're getting down in ways you never thought of before.

So. Calling targets.

Or, another option could be to make it a munitions power like "Paint Target" which would maybe place a target icon over the mob and give a damage bonus to group members attacking it. Could even make it a crafting item like a Laser pointer. hehe