There's this rare but still-played map, one of my favorites, called Space Pirate War RPG. It utilizes many innovative triggers such as modifying DEATHS instead of kills cuz if u think about it they're just Kills backwards, but... not really, cuz any player coulda killed and caused the death. However SPW also used modifying deaths as a switch, which works pretty well and can save using switches in sequential missions. Unfortunately, it's over 500 KB so i can't put with this post.