Breach

All of Breach's abilities go through walls:

• Aftershock: a charge placed on a wall that explodes on the other side, dealing damage in the area. It pushes a defender out of a corner behind a wall;
• Flashpoint: a flash that goes through the wall and pops on the other side. It blinds whoever looks at it, without you having to expose yourself;
• Fault Line (signature): you charge and release it to send a concussive blast along a line through the ground and walls, concussing whoever it hits;
• Rolling Thunder (ultimate): a series of waves in a wide cone, through all terrain, that knock up and concuss the enemies hit.

Breach's kit has a clear theme: taking away the enemy's ability to react at the moment your teammates go in.

Pick Breach when:

• the team has a duelist who goes in first and needs someone to set up their fights: a blinded or concussed defender is almost always a kill;
• the map has sites with angles behind thin walls and narrow entrances, where abilities that pass through walls reach places others cannot;
• the team wants to play coordinated executes: Breach is at his best when his utility lands exactly as teammates peek;
• you need an ultimate that opens a site or wins a retake: Rolling Thunder covers a huge area.

Breach is also a great agent for learning teamwork: his value depends almost entirely on how well you time abilities for others.

One last advantage: Breach's abilities do not require exposing yourself. You can blind, stun and hit a whole site from behind a wall, and stay alive for the rest of the round. For a team, having a living initiator in the post-plant and the retake is worth a lot.