I thought it'd be nice if we all listed our top 3 changes to Demigod that would require 30 minutes or less. Each change can be any of the following: Change 3 lines of code in the LUA, implement a mod, or delete a section of LUA code.
1. Implement morpheas' favor item balance mod.
2. Delete Blood of the Fallen from the favor item menu (it's half a line of code in the LUA)
3. Lower Fireball's cast time to 0.4 seconds (this might require editing animations which would make it too big of a change to be listed here), increase Rook's speed to 5.7 or 5.8, and make Essence of Magic a General's favor item (it's also half a line of code).
My suggestions are subject to change if I see any better ones posted here.