The big thing is with Poisonous Bog your only variable is the three x3 Dragon Fang drops, which go at a 60% clip each. So if a perfect Claudia or even a high-level Claudia is the key, I want the good chance of the 13 drop or the occasional 16 drop. I charted all my runs; sure 10 pops up at times and once in a while I get a 7. But you get a day of three or more 16's and it really gets you over the curve and lowers the SC burn a bit, as a free player it really helps.