>>530546692
Once you start regularly playing d7+, you'll be used to the amount of enemies that appear and really you'll need to start taking stratagems that can control a breach/drop. it'd be anything that can be dispersed over a wide area, usually napalm/orbitals. Sentries can also be used but placement can be iffy depending on where it happens, just notify your team beforehand and it'll probs be fine.