Why do you think Morninga killed Devastator, and not Angel? It seems to me that Morninga went to mine a target protected by Angel, and that's why he was killed. ))
Scavenger was mining, Nigel used his ultimate.
Wolfstet was killed by the first team of mafia. Leon - by the Maniac.
The ultimate worked on the good guys and didn't work on killing the mafia.