I agree that we all have different ideas for the HOW, but the one thing we ALL want is for a save Karlach/Karlach lives and is okay in Faerûn ending.

I absolutely want to be able to end tragically or in Avernus, keep those in for replayability and flavor or choice (as some people genuinely feel satisfied with that and accept them for what they are). But if everyone else can get a remotely good ending, so should Karlach.

If I want her to be able to live out her dream of growing old with Tav and maybe scaling down a bit on the rage/living a simpler life, GIVE IT TO ME. Or rather, LET US GIVE IT TO HER.