Anyways, estimates. I think we should be looking to go hard into breakthrough at week 38.
Meridian-wise, for the rest of our arts we need to get:
- Spine - AM (we have this)
- Spine - AS (get next week)
- Arm - AC (get next week)
- ? - AS (get with Eightfold)
- ? - FZ
- Arm - FSA
- Spine? - TRF
So, with our current (best) plan of doing something like EPC/Meridian/Meridian/Zhengui/Job next week to set up for Eightfold week 33, we should after that "need" 3 more meridians.
After Week 33 (eightfold), with any luck we should have EPC4, and not need to go any further.
We'll also have AS2, AC2, AM4, TRF3, FZ3, FSA3 (almost 4), and AE1.
Now, we still need two more Physical rolls as well as our 2 Highsun to reach peak. So with our meridians that's 5 actions there.
FZ should (hopefully), just need 1 more action with our Skyblood to reach FZ4 (should be fine as long as FZ4 is ~80 or less). FSA5 will probably need 3 more actions. AM5 should (assuming we've trained it in eightfold week and don't roll badly) require 2 more actions if we want it to finish ~38-39. TRF4 will, assuming it's 120, require 4 actions. This is doable by week 37, assuming we don't skimp on cultivation.
Basically, starting from 34, we have to do TRF every week to get it by 37.
So, something like:
Week 34 - Physical/Meridian/Meridian/TRF
Week 35 - FSA/FZ/AM/TRF
Week 36 - Physical/Meridian/FSA/TRF
Week 37 - FSA/AM/TRF
Should allow us to go into breakthrough in Week 38, and have EPC4, FVM5, SCS5, FZ4, FSA5, TRF4, AM5, AC2, AS2, AE1... Which is pretty good.
It's difficult to do things earlier than this unless we want to forget about TRF4..., and getting Arts actually capped before this point is challenging.
(if we get a music art from Shaman bag or Zeqing though, our lives get more complicated

)