I discovered this arrow in a private game while playing Sova. It reveals a bit of b main, almost the entire b lobby, a bit of mid link and even a part of attack side spawn. I obviously don´t know every arrow possible, so there may be other, even better arrows, available. But this arrow is still useful because many players probably won't expect it.

https://reddit.com/link/kp2k9n/video/xe9h6f2soy861/player