The requires only discovering, it is independent from the +2 boost which requires a real investigation. Therefore it greatly upgrades testless clue such as Working a Hunch, Drawn to the Flame, Gravedigger's Shovel.

Dropping a clue from 1 to 0 with e.g. Forewarned, Dr. William T. Maleson maybe virtually free if you can pick it back up together with the other clue you are looking to get anyway.

Though an official ruling of Taboo is that you cannot partially follow Taboo, per an investigator :

Investigators are not forced to adhere to the restrictions on this list, but if an investigator chooses to do so, they must do so in full (an investigator cannot pick and choose which restrictions to use).

The reasoning behind this card getting +3 Chained is that :

We’ve also taken the opportunity to chain everyone’s favorite Eschatologist, David Renfield (+3 experience); the reasoning behind this change is in anticipation of many of the new cards coming in The Scarlet Keys Investigator Expansion, which are likely to propel this already popular powerful card to new levels of power.

So I think it is quite fair if a player is selectively following Taboo for something like Dr. Milan Christopher, but not David Renfield if you don't have any Scarlet Keys cards in your deck, if you are just looking to play with doom the old school way. (Perhaps for Daisy Walker deck that could include both.)

With 2022-08 taboo, Ritual Candles works with all symbol token. It means that with two Ritual Candles, the net-modifier of the token is 0. Now, we don't need to fear even if lots of are in the chaos bag. Double Candles help to overcome the main issue of the curse spell; it's hard to succeed the test when the is revealed. How to add in the bag? Here is Rite of Equilibrium, which is just 3xp to purchase.

Incredible card, the ability to have a free movement, which doesn't cause opportunity attacks(which also means you get away from massive enemies for free) and can be given to other players is incredibly strong.

Notable investigators i've found make good use of this:

• Amanda Sharpe can use this to move and still have her full 3 actions for a power turn wherr you have Deduction under her
• Luke Robinson can use it to move two locations with his ability

"As you come into this world, someone else is also born. You begin your life, and she begins a journey towards you. She moves slowly, but never stops. Wherever you go, whatever path you take, she will follow. Never faster, never slower. Always coming. You will run, she will walk. You will rest, she will not. One day, you will linger in the same place too long. You will sit too still or sleep too deep. And when, too late, you rise to go, you will notice a second shadow next to yours. Your post will then be delivered. Please tip your courier."

Incredible signature, incredible flavour. Love my eldritch postie.