Leadership: no experience
Athletics: necessary - and drag it sky high! It lowers falling damage, increases time you can spend underwater significantly, and improves jumping ability (do not forget that W&W is Prince of Persia often!). Recommendation: Athletics 12, all characters.
Scout: According to my experience, the higher level the bigger radius it affects, i.e., you get warnings sooner, but... But you do not get any warning about some creatures (Amazoni Mantraps and Jungle Lilies, for example) and about any quest creatures (Mon the Sculz, etc.), no matter how high your Scout skill is. Scout 12 does not help.
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