The main priority of this entire effort in general, is to provide authentic recreation of RuneScape servers and player experience from the days of the past.
So with all of the bugs, nerfs, and buffs, that have happened throughout the years, we would essentially follow the exact same path.
There is a Google sheet here which shows all of the RuneScape clients and caches we have access to, which allows us to recreate the server:
Starting from May 2004, we will update the game to every single one of these ones marked green. This is more of the “short-long term goal”. The “long-long term goal” (in the case we are still alive) is to keep going further and further (2007, 2008, 2009, etc etc), I guess until something stops us.
So back to your examples, it depends on the dates of those specific nerfs, buffs, and fixes happened, and then comparing to the Google Sheet if we even have that date. It’s possible a number of versions could be skipped where we just land on after the nerfs and such. If that makes sense?
If this helps, we will not plan to preemptively do fixes and such, like you are describing, only when it becomes authentic for that period of time.
The ONLY caveat to all of this, is if the update introduced something that actually caused a rollback to RuneScape, like the Durial 6/6/6 bug. But, we will document how the bug worked, and maybe even provide a server for that update, but not actually host that update ourselves.
I hope this helps! If not let me know!