Bard x2 should be higher on the list. Cleric should be at the very bottom for the high levels, what are you even going to kill like that? Like, you can go hunting undead to level up, but once you're at the high levels, nuking is too weak. And outside of fighting undead, that's a trash duo. Rogue x2 should be higher than Warrior if you have Mrylokar's Breastplate.

2x torp sham: kill anything a solo torp sham can, but kinda faster!

2 torp shamans covering 2 camps in 2 different zones is the best duo... maybe meet up if you're fighting an enemy you need to kite to land slow on (lodi?).

Enchanter always #1. But I think two skilled bards could get a lot done.

The answer is any class that has decent pets or can otherwise Charm

2x gnome warriors that both have puppet strings! Go!

This topic actually made me wonder if a large enough zergforce of any class could take down raid mobs. Like... rather than having any kind of tank, or even clerics, could 400 wizards somehow kill a boss? Or like 1000 rogues with no healers or tanks?

yes

They would desync like on doze raid lol

ive always heard stories of all mage guilds or all monk ones.

There was a guild called "The Tinkerers" or something similar on Rallos Zek that was all gnome mages I believe.