I mean if she just had something like an activated talent where every 30 seconds she can place a proximity mine that blows up 1 second after being triggered, that would be cool. It'd be something she can do without losing her cloak, yet it would show she's probably in the area. It could be used for better effectiveness vs waves and mercs but not make her a character that could just clean them up all the time, and you could make it so structures don't activate it. With the delay after trigger, it'd be hard to land on heroes that have good awareness, and you'd be picking it at the sacrifice of some other talent. Seems fair.