As much as I don't want to use wow as a example, I'm going to because they have completely nailed solo content in 2 specific scenarios. The warlock green fire boss fight and the solo artifact challenges via the mage tower in legion.


Both of these challenges were completely tailored and designed around the class it's intended for and they both push you to utilize everything in your classes kit to complete it pushing you to become better at your class in order to overcome the challenge.


I'd personally love it of SE implemented job based solo challenges. Just my 2 cents on the matter.