Programming Hemalurgic Spikes (again)

[Trusk'our he/him]

I recently made another thread on how one might be able to use specific Rhythms of Invested powers to program the Investiture and make that power usable for things like Feruchemy (although TLM shows Unkeyed Dor, which works just fine for any Invested power, so this strategy of programming isn't all that useful).

However, I now wonder if it would be possible to take a Hemalurgic spike powered by non-Metalborn and use a combination of Rhythms emitted by Invested powers and Intent to program the spike to have the power you want.

My thinking of how someone would go about creating Hemalurgic power spikes from non-Metalborn currently looks something like this.

1. Use Hemalurgy to take an Invested charge from a person.

   A. Make sure to either give the donor access to F-aluminum (via Hemalurgy or Unsealed Metalmind) to blank their Identity while you harvest their Innate Investiture (so that it can be combined with other donor's Investiture; Identity contamination is a real thorn in the side if not handled properly) or give the donor access to F-gold (with lots of stores saved ahead of time) to replace lost Spiritweb fragments. Identity-blanked Spiritweb fragments may also be more susceptible to being programmed (as a Feruchemist blanking Identity is susceptible to "all kinds of things"), so even if you provide them with F-gold you may also want to give them F-aluminum anyway. 

   B. Also, make sure the spike is made of the right kind of metal to properly channel the Investiture (i.e., if you plan to program it with A-pewter, use a steel spike for physical Allomancy), otherwise you'll end up with the same kind of situation if you alloyed an Invested Metalmind into another type of metal (Investiture is there, but can't be accessed).

2. After sufficiently charging the spike, use Navani's method of changing an Investiture's Tone but instead learn and use the Rhythm (the pulse that A-bronze can sense) of the Invested power you want the spike to have.

   A. Might have to be a very skilled Seeker to achieve the necessary insight. It might also help to travel to Roshar and Hemalurgically take Connection from a Singer, but that may not be strictly necessary.

3. Now that the spike has been charged and exposed (with Intent) to the Rhythm of the power you desire, it should change its function to grant the power you want.