1. Bruno Carioli (TiV) - Probably now one of the best weenies in the game, along with Alternative Historian.
2. Whitton Greene (SoK) - the toughness and additional investigation struggle booster is great; the ability that gives card advantage is icing on the cake.
3. Lucas Tetlow (SoK) - An invulnerable 2 cost character that steals support cards.
4. Museum Curator (TWB) - A cheap chud character that puts into play additional cards, which means he is card and resource advantage.
5. Combing the Archives (LR) - With two investigation struggles and no terror or combat, this is the rush deck's dream story. Combined with Open for Inspection (Core), you can win this story handily, even if opposed.
6. Daring Buju (SoK) - The surprise factor of this card is unmatched in MU, especially at that price point. The 3 steadfast make it most useful in a mono build, but it is possible to run it dual-faction for a shocking turn of events at a story. Another one of my favorite MU cards Binding (Core), falls into this category of surprise control, but the Buju is better.
7. The Necronomicon (SoA) - While it is expensive, this card is frightening to play against if you don't have ready support control. If you have a way to recur it, like Archaeological Dig Site (SfW), Combing the Archives (LR), Marcus Jamburg (***), or ways to protect it like Library of Pergamum (***), then you can steal one problematic character and destroy it if they dare oppose.
8. Andrew-Chapman (TKatG) - He offers character protection and he's not loyal like the other explorers.
9. Alternative Historian (SoK) - A wonderful chud. She replaces herself, and gives you the ability to control critical struggles to push through on investigation.
10. Flux Stabilizer (PT) - The last card is hard to choose, but I had to choose this one because of its ability to disrupt so many good and popular "enters play" cards like Stalking Hound (PT), Black Dog (***), Master of the Myths (IT), Dreamlands Fanatic (ItDoN), Broken Space, Broken Time (CoC), Shocking Transformation (Core), and Under the Porch (THBtS).
- Open for Inspection (Core) - Another quintessential rush card, which can sometimes allow you to win a story all in one go.
- Anthropology Advisor (Core) - Perhaps one of the best representative cards of the Investigator build, which is a prominent subtype in MU. Reduction, good icon spread, and giving investigation to your characters is pretty good.
- Mask of Sthenelus (IT) - I just love this card. It's a great way to protect your important characters, or send them into a story alone, and since it's a relic, it goes back into your deck.
- Professor of Folklore (ER) - His ability is similar to Forest Sister (Core), who is well-known as being very resilient, but this works for any MU character. So he can just sit back on the sidelines and protect your key characters.
- Board of Trustees (SoK) - Very efficient for a 4 cost invulnerable character. Since Y'Golonac (Core) sits at the same price point and he's an autoinclude, I wonder that more people don't run the Board, but 4 cost is just expensive in MU. However what you get for 4 cost is pretty amazing. His passives just let you power through some stories for the investigation, but he can take on stories on his own.
- Binding (Core) - One of my favorite cards probably of all time, it's such a good toolbox card. You can play it with Hastur to do surprise insanity, or with Agency for surprise combat, or just to power through on investigation.
- Dr. Laban Shrewsbury (WaB) for his ability to bounce AOs repeatedly - when your deck gets thin enough, your opponent won't be able to keep any AOs on the table and will be hemorrhaging resources if he tries.
- Mu (SoK) - This takes a lot of the sting out of the terror and combat struggles. If you can mitigate the attrition rate of your characters, there isn't a lot that any deck can do to stop you rush stories. Dr. Carson (TSotS) is a similar effect, but a little slower and more vulnerable; he was (and still is?) a very good card.