Browne and myself did this tactic while playing tonight and enjoyed some success with it.
What you basically do is essentially what is the subject title says which is having a lookout for the enemy by gaining a vantage point .
now this can be done in various places depending on what map your playing and essentially the lookout would be calling out where the enemy is to your teammates to gain a tactical advantage over the enemy.
this is something that is very simple but effective idiot proof and promotes teamwork.
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