Sweet mother of mushroom no matter how hard I try to dispel this myth it keeps coming back.
Cleric will NOT be primarily a healer! Cleric will be a holy-based mage subclasses that happens to have a healing ability. It is in NO WAY a support class. It is the tank of mages, focusing primarily on self-sustain while still having great damage. The ability to lightly heal others is a plus.
“Tankier” classes, while having less DPS than more glass cannon builds, will still be able to deal considerable damage because they will be able to attack during sequences when squishier players will need to back off.
As for the drops, they are based on damage. Whoever got those drops either did an insane amount of damage or were insanely lucky. It is random, but it is weighted heavily by how much damage you do.
That, or the person who said they got 7 drops from one boss is lying and they actually got it from multiple fights. Idk