Dissenting Opinion: I don't like On the Hunt that much and have had mixed success with it. I've got two central issues with the card: the first is that it misses pretty frequently, the second is that I don't like it's cost ratio.
Let's take the second problem. The question posed below from another reviewer is "would you rather draw Rotting Remains or Swarm of Rats?". But that's not quite right. Instead it's would you rather draw Rotting Remains or Swarm of Rats, where the rats has "revelation: lose one resource and one card"?. Faced with these two, I'm not sure I prefer the rats. And that's when the card actually hits!
Sometimes it misses and draws no enemies at all (a terrible feeling, as you've just taken a nice and easy shuffle and thrown it away). Sometimes it hits but you were going to draw an enemy anyway. Sometimes it fishes a hard monster you weren't going to see for a few turns. Sometimes it finds you an enemy that was going to spawn somewhere unimportant and you could have just ignored. Sometimes it even drops an enemy on you that you dislike (like Poltergeist), which might be OK if you are Leo or Skids and are Adaptable (and can leave it out for such scenarios), but most Guardians don't have that luxury (and anyway, there are usually better things to do with Adaptable).
And yes, it helps protect your friends by thinning the deck, but it doesn't lower the chance of them also drawing a enemy by a huge amount, and does increases the overall amount of enemies the group has to face (on average). Enemies are generally the worst treacheries. You're here to make sure they die, but you'd still rather the team as a whole faced as little enemies as possible.
Don't get me wrong, it's not a bad card. More often than not it does what it's supposed to - find a monster, thin the encounter deck, protect your teammates (sortof), and give you something to shoot at. As another reviewer points out, it also finds XP enemies when you want them, which is kinda nice. But I find than when I weigh all this against its downsides and my experiences from playing it, I hesitate at giving it a deckslot.
A good comparison for me is "You handle this one!", which by contrast I think is fantastic. YHTO always hits, always does something of value, directly protects the team's weak points, and gives the Rogue a resource for his trouble. I'd much rather the Rogue passed me his monsters with YHTO and I just take my own treacheries in the face (especially if he's drawing after me). I'm a hero, I can take it. Just so long as he finds all the clues and gets us both the hell out of here.