Essentially, I'd like to use an unfinished archon for my purposes.
None.
This may or may not be the route you want to take because it can take up time. If you also want to use a count down timer to ward of players who are not paying attention you could also do that. Just remove the Protoss High Templars that are not melded by the time the count down timer has expired.
Vrael -- NudeRaider
Vrael -- it only costs 50% of my post-tax salary for life and in return I get to also become a drone whose sole purpose is CAPITALISM
Vrael -- pssht, you're still using a phone? I just record 100% of my life using my ElonBrainChip
NudeRaider -- bro I don't go anywhere without my phone to record anything significant
Vrael -- Zoan