I was testing it out earlier, and it's actually a really consistent form of revealing people on gens. The fact that the 8 seconds of aura revealing go on even after the 30 seconds are up means you can get way more mileage out of this than you'd think you would just from reading the description. Plus, if you're a killer with lots of lethality and can get hits in quickly, or a plague or huntress that can get injuries passively, you can have this up for most of the game. And no, most survivors will not constantly be hitting great skill checks, so the perk is basically a pretty nice aura reveal on everyone on gens for most of the match. Definitely worth trying out.