Thought of a cool idea if we would wear only unenchanted armor and would give us buffs.
Diamond - Nothing
Iron (Mining Set) - Haste 2 And Night Vision
Gold (Bard Set) - I dont really know what to put here, put your suggestions below
Leather (Archer) - Speed 3 and Resistance 2
Chain - Nothing
Now, if you think it should be changed then go ahead ^-^
NOTE: You would need to wait around 5secs or so for the class to start, also its not that op either the fact that its obvious that Leather would get a decent buff since pretty much whoever has strength 2 + Sharp 3 will insta-kill them.