Talk:I-19/@comment-36.74.111.14-20150804172939/@comment-26154973-20150804183527

1-5 is your best bet, anything else (2-5, 3-5, 5-4, 5-5, world 6 maps) is harder / with lower rate. For 1-5 you have ~1.7% for pre-boss S drop and ~2.9% for boss S drop, so ~3.7% (= 0.5 * 1.7% + 2.9%) on average for a full run with S ranks for pre-boss and boss, aim for ~20 (for ~50% rate) to ~60 (~90% rate) such runs (over 100 in the worst case).

I waited for her until HQ 100+ with no luck, then just farmed 1-5 till she dropped (~30 full runs, ~20 buckets).