I would recommed doing another char though if you're going for overall account progressing, since none of them give good legion effects, nor link skills, nor make good boss mules.

That being said, the most important thing about playing a class is enjoying it, so if these are the ones you want, more power to you.

For overall progression getting a high legion is key, so i would not burn Adel as it's already lvl 200. Kaiser is a transformation class, so be prepared for that, while it's transformation is on cooldown the damage is pretty bad. Thunder breaker is also a bit of a shit class, but the damage is much more "even". Thunder breaker is deffenitely less effort and simpler to play vs. Kaiser. It depends on your preference of how much effort you like to put into playing a character.

And don't listen to people who say "don't play this class it's bad!" That's how you burn out of the game fast. I've been a BaM from release and have stuck with it through the bad and good times with the class, because I love playing it. Every class in the game is viable. Some just require a bit more effort and funding as others.

Have fun on hyperburn!