When you hear the hack sound you spin in her direction (if you have good speakers with surround sound) to interupt the hack, then you stun forward to put yourself into whipping range, then mace to finish. 15 meters is easily covered and no hack goes off. Not to mention Brig should be in the middle of her team making it hard to single her out.
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Typical seasons were dive and deathball, now it is attackers are all ranged and you get several picks from range before you move in. Brig can't heal if she can't get into range.
Orisa Zen, Widow, Soldier, Hanzo, McCree and your own Brig in case they decide to come get you or when you take the point and need to stabalize your own defences.