The real benefit of this card is that you can take it twice. You might fail your first action, sure... but Survivors generally don't mind that. Or you could just move or play an asset... but this modifies the difficulty of your test and because you skill value cannot fall below zero, on your third action 2 shroud locations and two fight enemies have a difficulty of zero.

The benefit of this is clear with Stella, but the beauty of it comes for Wendy with access to Leo de Luca, haste, and the skeleton key. Action 1, fail with drawing thins/take heart, place the skeleton key, move, or play an asset Action 2, place the skeleton key, lockpick, or winging it (difficulty 0 because winging it further reduces shroud) Action 3, investigate with difficulty 0 at any location (assuming you played the skeleton key) Action 4, investigate with difficulty 0 at any location Haste Action, investigate with difficulty 0 at any location.

EDIT: Nevermind. The Necronomicon goes in your threat are, not your play area.

In addition to the other good reasons to run her in Daisy Walker, I believe she enables you to get rid of your weakness "for free." You can't choose to discard a weakness from play, but you can choose to attack your Necronomicon to Abigail. And if Abigail were to leave play, then all her attachments would be discarded. So, try running her with Calling In Favors and Art Student, or another cheap Seeker ally. If you don't draw Abigail, you can use Calling In Favors the normal way: Play an art student, return them to your hand, and try to find Abigail. But, if you do draw Abigail, you can hang on to your Favors until you draw the Necronomicon. Attach it to her, bounce her to your hand, try to hit an Art Student for a free clue, then reply her at leisure.

It's practiced. You have no excuse not to shove Practice Makes Perfect into your Mark deck now! Other practiced skills he likes are Overpower, Take the Initiative, Vicious Blow.

Practice Makes Perfect is also a tactic, so you can attach that to Stick to the Plan.

This card will seem more useful when you remember that parley actions, like fight and evade, don’t provoke attacks of opportunity. So even if someone’s coming at you with a butcher knife, feel free to ask them a few questions. And if you have handcuffs out to use, keep your new pal around as long as you need them. Turns out the real Arkham horror was the way you treat cultists!

Spoilers for The Dunwich Legacy:

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..... In the last scenario Lost in time and space to get best ending you have to resign so you have to spend 2 clues. But not with this card. You not only resign from anywhere but you don't have to spend the 2 clues, which is awesome if you are some kind of fighter.