I'm unsure about some of those categories.

Use Rope and Survival? Maybe.

Tumble, Balance, and Escape Artist? The first two, sure, but I don't recall Houdini being a remarkable tumbler.

Similarly, Decipher Script and Forgery really don't seem to have any skills in common - they just both have to do with words.


And personally, I support just dropping the Concentration Skill althogether - any damage and you lose the spell (but that's just me)!