If getting into Hell is the only "Happiest" option we can get with Karlach, made it so it like what we get in Planescape Torment.

Getting into Avernus doesn't have to be all gloom.

Councellor Florrick's favorite Warlock.

Back Black Geyser's DLC: https://www.kickstarter.com/projects/grapeocean/black-geyser-dlc-tales-of-the-moon-cult (RTwP Isometric cRPG inspired by BG1).