Unreliable-Spin
This opener is also known as "SPDC", A troll opener concept by URATOS and fixed by GRENKIFY. This opener starts with two T-spin Singles and finishes with a Neo-TSD and an incomplete TST (TSD).
this opener is dogwater on purpose <3
First Bag
The opener starts with a stick-base, but the I piece is at the other side (Mons). Early O before S/Z is required.
Second Bag
This bag is not 100%. O>L T>SJ (someone correct this if wrong qwp)
If you can't make it, best to just avoid it and go to midgame.
Third Bag
There are many ways to build this bag.
If possible, best to wait for a second T for a double TSD attack. If it's impossible to make an over hang, you are free to take the Neo-TSD and continue the build.
https://harddrop.com/wiki/Polymer_T-Spins#Neo-TSD
Fourth Bag
Freestyle stage. Best to make a 8-1 stack here.
See also
https://harddrop.com/wiki/Polymer_T-Spins#Neo-TSD [How to do Neo-TSD]