Making this card belong to Seekers is a baffling decision: there just aren't that many spell cards in their class, and some of them cost 0 already (https://arkhamdb.com/find?q=k%3Aspell+f%3Aseeker&decks=player)

I get Agatha is a Seeker but she is also a Mystic. so I don't see the reason why to gate this card to be Seeker-only: it should be Mystic or double class

This already suffers from the issue of other economy cards (if you draw it early, great! If you draw it later in the level, it's useless), and it's only useful if you are planning to Investigate/discover clues, but printing it as a Seeker-only card kill all of its utility.

Right now the only people I can see this being even remotely okay on are Seekers with Mystic access, like Daisy, or Mystics with Seeker access, like Marie and Luke

Disclaimer: I have not yet played this card.

Let's analyse it from a purely mathematical perspective: It costs 2 resources, a card and an action to put to play. It comes in with 0 resources. Meaning you have to discover clues 2 separate times (since it gives you a resource for each time you discover clues, not each clue discovered) in two separate turns (it exhausts) to break even just for the resource cost. If we assume the usual "an action is roughly equal to a card which is roughly equal to a resource", you only break even after 4 turns of investigating.

Actually, not even that, since it only pays for Spells cards.

To paraphrase an artist: "there are builds, I'm sure", if you already have Geared Up in mind it saves you a resource and (potentially) an action. But it's kinda hard to see a deck that would need Spell economy whilst having so many Items to justify Geared Up.

I understand the designers were terrified of another Dr. Milan Christopher, but this seems far too niche to be useful for anybody. Maybe if it cost 0. Maaaaaybe if it was fast. Maybe if it used charges instead of resources.