To create an anti-boosting class, you want to achieve Level 37 (unlocking the Sitrep perk). This perk is also ideal for replacing Scrambler Pro. In Free-For-All, most matches have a couple of "boosters". So by equipping Sitrep, the enemy Tactical Insertion is visable through walls by a red glow. While it may not totally rid them from their activities, it's good to annoy them for a while.

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