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Ms. T-spins STD is a Japanese opener created by Ms. T-spin. It was also separately discovered by yamcrunchy in october of 2022.
First bag
The setup rate of the first bag is 72.54% when counting mirrored.
Second bag
You can always stack the second bag this way but will often require softdrop.
Perfect Clear
There are a total of 2 PC setup which are both very similar making a perfect clear very simple and goes into DPC. But the sacrifice to this simplicity is that the PC chance is quite low, being 41.67% and also leaves a undesirable stack. Both solutions require O before Z and have O, Z, I and J in the same spot only differing by 2 pieces
Solution 1:
Leftover T piece O before Z, L before T and LT before J
Solution 2:
Leftover L/J piece O before Z, T before S and TS before J
Alternate route
In the second bag by holding your J piece you can increase your PC chance to 56.43% making you able to PC more than half the time with 6 minimals and one unique solution.
Solution 1
27.5% LJSTZJI
Solution 2 27.1% LJZTSJI
Solution 3 23.0% TOJSZJI
Solution 4 23.0% LOJTZJI
Solution 5 19.4% LOJTSJI
Solution 6 15.6% LJTOSJI
Solution 7 9.5% LJTSZJO
Third bag and beyond
These are all continuations found in the original Ms. T-spin's STD fumen. With Path 1 and Path 2 you should be able to complete a TSD every time.
Path 1
TSD
You will be able to complete this TSD most of the time being stackable 66.67% of the time requiring L before O
Skim STSD -> PC
This STSD isn't as preferable as you will need to skim a line with the Z piece clearing your b2b chain. The likely hood of you not having any garbage is very low
After completing the first TSD in the STSD you now have a 99.40% pc chance with 10 minimals
Path 2
TSD
You will be able to complete this TSD 66.67% of the time requiring O before L
TSD
You can stack this every bag with softdrop.