1) If the healer deals dmg and is doing his healing job good too, he gets it
2) BLM with good aoe skills gets it
3) other good dd's get it
4) the less worst player
Sometimes if every1 was the hell to play with nobody get's it and it'll be lost (for example my last amdapor run, where i said i open doors as tank, because nobody wants and then the drg+heal open a door. Drg first time, heal said he didn't read... Whole run took ~ 40min.)