As the title says, would you like to see profession specific challenges? Basically very similar to Adventures, but for the professions themselves. The whole idea is early on they teach you about some of the basics of the profession. And later on they challenge you over some of the more advanced features of the profession that you might not know about.
They'd appear as several levels and unlocked at certain points of the character's life span. Adept, Master, Grandmaster.
So, Adept would simply be the early levels. Where a character would normally be going through the tutorial for the game. And it's just over very basic elements. Ranger sending his pet after something. Thief backstabbing. Warrior's adrenaline mechanics. You can basically burn through them without being pressured.
Master Unlocks with a level 80 character. These challenges are more difficult, but will teach you some of the more advanced things by showing an NPC off to the side doing a certain action as your hint.
Finally Grandmaster when the master Challenges are done. These are timetrials with puzzles that tests you on such mechanics.
Like Thief racing through the map by rapidly chaining shadowsteps and Steal on enemies. The map for them would use the PvP logic that allows you to shadowstep anywhere that you can normally walk.
Engie having a similar race called "Rocket Man" where they're jumping through platforms using the boots.
Warriors having a Gauntlet where they start with low health, must use defiance stance to sustain themselves.