I've completed the 11 quests in the base Zombicide: Black Plague! box (i.e. 1 necromancer, 1 abomination, no expansions), and I found that Clovis and Samson consistently lagged behind in terms of experience.
The other survivors have easy to identify roles (Ann and Nelly are fast, so have rapid response roles. Baldric and Silas have fire support roles).
My question is, what roles do Clovis and Samson fulfill that allows them to keep up in terms of experience?
PS. As a group we try to make sure we level up together, which works well until the orange danger level, where the other survivors shoot up. We also try to compensate by having Clovis and Samson score objectives when they can.