Here's my personally modified changes.ini. The only change I made was copy and pasting the missing section from the mod being sourced. Put it in the tslpatchdata folder.
changes.ini
I had the same exact issue when trying to install, "The [Battle_Meditation] section was not found in the ini, referenced by 'AddRow0=Battle_Meditation' in [spells.2da]"
If you don't mind me asking Drew, where did you pull the missing ini section from? I tried looking at the mod files and could not find it and i tried looking through some other mods.
Just tried to install it, but there's an error in the ini. [Error] [16:52:05] KeyError: "The [Battle_Meditation] section was not found in the ini, referenced by 'AddRow0=Battle_Meditation' in [spells.2da]"
Fixed! I pulled the missing ini section from the K1 Battle Meditation mod's changes.ini and put it right below your [spells.2da changes]. I'll test it to make sure it works and get back to you.