If you're still wondering about cooldown reduction, each source of it will multiply. So 2 sources of 10% will be 0.9 * 0.9 = 0.81. For pet/sentry damage, it takes your attack speed into account but it increases their damage by that much instead of their attack speed (you can basically think of your attacks per second as a dmg multiplier). If they're like witch doctor pets, then they'll also benfit from bonus dmg to elites, and won't benefit from the area dmg stat. You might want to test though.
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