It’d be cool if you could “mentor” someone of a lower level. I know my main is going to have all the classes maxed eventually and it’d be really fun to match the power of a lower level player and get to play with them.
With that said; lots of games do this mentor thing and the mentor is always way over powered. Trivializing the content. So it’d need to be done really well to avoid making everything easy. If you choose to mentor, you should seriously only be as powerful as the level you mentor to.