https://youtu.be/HCJG-xxq0Cc
The correct answer is
>>542488325
>>542488368
6p as these anons suggested. 8888
>>542488392
2s was my first instinct as well but if we end up with a shanpon wait, then 2s and 3s look much better compared to the 56p wait, even if the value would be the same.
>>542488417
>>542488590
>>542488702
If we are aiming for toitsuba then we should aim to drop 8s instead of 47s. The 4 and 7 have a magnetic pull according to Tsuchida that will help getting the right pair, like >>542488510 >>542488826 and >>542489560 suggested. It's also the only tile that won't cause any devastating backfire for our normal shapes. Nevertheless, toitsuba is not the answer here when dropping a pair gives us much better options for tenpai.
>>542489160
While greed is not beneficial, according to Sakurai we shouldn't squander our wealth either. 0s is a boon to this hand which shouldn't be wasted.