Absolutely.
Shade has one of the best utilities in the game and is sought after in many of the hard boss runs. If you gear your character well and learn him, you can join a ton of boss parties.
He has one of the best debuffs against bosses that helps the entire party (practically a 50% final damage boost), he also has a great area bind that stays a long time. He is very mobile and also has a CD reset skill and let’s to use certain skills behind a long CD much more often.
There is a shade in the KMS Scania Black Mage party and it sounds like he is super important