Sages and Operatives always will put out big numbers on the scoreboard due to the nature of their HoTs and persistent AoEs, if specced. The Commando/Merc does the big burst single-target healing, where and when it counts. And the other two can't even come close to our survivability. As far as utility goes, Bubble Stun is still an anomaly and I wouldn't count on it being around forever.
Sage and Scoundrel get larger heals + their HoTs.