Didn't know for Vanish 1, but I soloed the ml4 part with the Mau Nomads and they didn't chase me after I vanished. Think most of times I've used Vanish when a fg was breathing in my neck or 1 time when 1 sb unstealthed me with 3 more near and a fgm a little further.
Personally I think vanish is nice although you are disarmed for 30 sec.
Personally I think vanish is nice although you are disarmed for 30 sec.