Actually, Geodes/Avatarites are NOT timed drops; at least not 5-minute timed drops like seals/crests.
http://www.bluegartr.com/threads/106...=1#post4948526
It was blink-and-you-miss-it testing but that now-broken image was a screenshot of two breeze geodes in Nynja's treasure pool.
Anyway, if you're geode farming specifically (which you are), you're targetting mobs between 60 and 80, on which a THF is perfectly free to sub WAR, ride berserk with cheap food to cap attack, and totally obliterate as fast if not faster than any two-hand job.