On the topic of getting high-level PCs to join low-level ones, I was on a mod where Jed lead the story up to the boss fight, and would describe what we saw out of game and then ask questions in-character about what we'd spotted. It was a very skillful balance. I'd like to see more like that, where a high-level PC leads a group through a series of events and then helps with a boss far in excess of the new players' levels.
Main: Grigori the grumpy healer, adopted member of the Tribe of Berk, adviser to Chief Darius Redmaw.
Alt: Dorian White, physician and alchemist for hire.
Alt: Ruy Sanchez de Castor y Ortiz, the best swordsman in all of Coast Haven!
OOC: Matthew Bowman
Science fiction and fantasy editor, longtime tabletop GM, newbie KR player.