Like the title suggests. The regular EADGBe works good, but is there a better one out there? I have a Yamaha acoustic, btw, if that makes any difference
Well, not so sure about tunings, but if you're after a flamenco sound you really need a spanish classical guitar (nylon-strung acoustic).

I'm guessing your Yamaha is a steel-strung acoustic guitar, as opposed to a 'spanish classical' guitar.
standards pretty accurate for it really
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use the phygrian scale.

try this progression, Aminor, G major, F major, E major.

The half step really gives it that spanish sound.