We are at 300 coppers. In 1 week, 5 weeks, and 9 weeks we get our allowance, so 800 each gives a total budget of 2700 coppers. This translates to 9 Spirit Herb Pills.
@Timewinders can a single pill be split between cultivation actions? The pill description says all cultivation actions over the week, so I assume so in my plans below. Otherwise for efficient medicine usage we should always cultivate in weekly slots, i.e. in groups of 3 actions. It muddles the dice math some though.
2 cultivation actions give a 99.9% chance of reaching Ghost Eyes 2, at which point each cultivation action gives 30 dice.
Assuming Ghost Eyes 2, 7 cultivation actions and the use of Spirit Herb Pills give a 97.6% chance of finishing a boost technique. I picked Wind and Earth because that is what I favour. Feel free to change.
11 spear training actions with tutoring gives 220 dice. Expected result should leave us at 119/600. Not sure it's worth it myself.
Putting at least 7 cultivation actions and some pills towards Physical Cultivation guarantees reaching Flexibility Cultivation 2. Increasing both HP and dodge. Another 9 cultivation after that gives a good chance of reaching the next Physical Cultivation, further increasing HP and either dodge or defense. The plan below guarantees two levels of Physical Cultivation, and has a good chance (97.5%) of finishing a third.
This plan should place us where Suyin was at our spar 3 months ago.
[X] Plan Rushing Physical Cultivation
-[X] [Cultivation] Ghost Eyes x2
-[X] [Cultivation] Air Blade – a red-level wind art that enhances a weapon's sharpness, aiding physical attack rolls. (0/60 successes) x7
-[X] [Cultivation] Stone Skin – a red-level earth element art that increases defense (0/60 successes) x7
-[X] [Cultivation] Physical Cultivation x17
-[X] [Tutoring] Physical Cultivation x11
-[X] [MedBuy] Spirit Herb Pill (+ 5 dice to all cultivation rolls for one week. 300 coppers each).
--[X] 9
-[X] [MedUse] Heaven Flower Elixir x1 - Physical Cultivation x3
-[X] [MedUse] Spirit Herb Pill x9 - Air Blade x7, Stone Skin x7, Physical Cultivation x13