May be unable to continue playing and testing the hack for a few weeks, so I'll address all the notes and bugs I've saved up until now.
-First of all, assuming it was intentional, making Gheb immune to ranged damage was a smart move. Actually having to fight him with colossus was pretty scary, and made for a good boss.
-In Ephraim's chapter where he recruits Duessel, the boss Beran has no incentive to be killed as he does not drop anything. While killing him might end the chapter early (can't remember), perhaps an item would do well as an additional draw to not turtle and encourage risk vs reward.
-Duessel appears to still be unable to move, granted this is from a save from v2.21, though resetting the chapter should've updated him no?
Regardless I've attempted to band-aid fix it on my end to no avail. As his movement is non-existent, any action replay/codebreaker (etc) codes cannot apply a bonus to his movement. I also tried fiddling around in both the chapter and unit/class modules in nightmare, but couldn't find anything pertaining to the mov stat.
If there is nothing I can do and it is fixed in the new version, then let me know and I'll speed back through the game best as I can to this spot.
-An odd bug from v2.1 that I never got around to submitting, was that Ross could use Reginleif and doing so would grant him a lance rank.
As another side note, if possible I'd be curious to know what your exact goals with the hack are? I assume it's to provide a more balanced/updated version of sacred stones. I just want to make sure I have an accurate idea so that any feedback I provide is relevant to you.