If you're playing a single invis player, you can usually track the player using audio cues. However, when you play a full team of invis players, you need to be smart: * Don't stand in a lane that can be challenged from more than one angle. Use a grenade to hold off an angle if you have to. * Understand that linear fusions will not glow while someone is invis, so you'll need to play a little closer to cover * Keep shooting as the Hunter dodges and keep the fire up even if you can't see his health bar * Keep your communications with your team quiet, so you can hear movement. Also, give concise location callouts, so your team gets notified of flanks right away * Barricades ruin Void Hunters' day. If you're worried about a flank, drop a Barricade. In my opinion, the best way to counter invis is by using audio cues. However, the ambient noise on certain maps (Looking at you, Burnout!!) is too loud to hear much. Unfortunately, there's not a lot to do about it