I achieved to cut 2 steps today, so am 4 off. It seems one of the several routes leading me to 143 offers more possibilities for optimization. Will try working on this one.
This level is really tough for how short it is. Every block interaction counts and there are a lot of particularly tricky setup points that can be missed throughout. Kinda blown away by how intricate a path came out of this setup tbh.
Tricky path... Hoping 139 is optimal.
EDIT: Finally got the 137. I don't think I've encountered this exact pipelining trick before, very hard to see the right way to do it.
Completion Difficulty