They are 100% garbage. 100b does only 30-40k damage, your 40% dmg teambuffs have a mere 4/5 uptime (if not traited) and their elites are complete useless since they just rezz downed players (on AE), not dead ones.
No srsly, they are borderline overpowerd. Signetbuild+ GS, and your leveling is almost too easy. Swich for banners in dungeons and everyone will love you.
On the other hand you have as much dodges as a thief (maybe more) and the higest base HP/armor.