I should specify that i play thief quite differently than the normal glass cannon, full dps, don’t care about anything thieves out there. I normally group with a greatsword ranger that tanks everything and i make use of his Healing Spring to basically heal the crap out of everyone while doing massive damage.
Unfortunately i can also do that on guardian with a little less frequency but also keep protection up on everyone. 33% less damage to the group with a double splash AoE heal every 4 seconds while also hitting 5 mobs is just too damn good. I won’t even get into the other group heals i have along with passive boon heals since it’s a recurring theme here. The bottom line is, guardians are just too damn good!