Sewer Flash and Kitty Flash at same time, middle flash to boxes comes during the mid push
B strategy 2 SA1 (1 kitty, 1 mid) 1 SA2 (stay hidden) 2 Sewer (slow walk 1:10)
At bottom of Sewer stairs, sewer team calls out alpha Kitty smokes and mid smokes. Kitty runs back through spawn to SA2. Mid waits for Bravo call. At door in B, Sewer teams call out bravo Mid moves to SA2 and they start to flash nade smoke the ladder.
Sewer team, in position at door, listens for flashes and smokes. As soon as they hear them, they open door and flash corner while other aims for awper to run. See screenshots.
Flash that corner. As soon as second player makes the move to clear left corner, follow and clear right. Open door and If no pick here, wait for flash to be thrown and clear left around corner. Once clear, move to support ladder team into site, or assist other sewer team member if needed.