Is your feature request related to a problem? Please describe.
So I was making a modpack with Mystical Agriculture. And I wanted it to be balanced. So I wanted to change Mystical Agriculture's essence equipment (because 24 Attack Damage is overkill, to say the least).

Describe the solution you'd like
I would like a tool/armor section in the config. Something like:

[inferium]
sword_damage = 12
sword_speed = 1.6
sword_durability = 200
axe_damage = 11
axe_speed = 0.9
axe_durability = 200
...
helmet_armor = 2
helmet_toughness = 1
helmet_knockback_resistance = 0
helmet_durability = 270
chestplate_armor = 8

I think you see where this is going. For all five tiers, of course, and maybe a bit more options (enchantability?)
I personally like how Mek did it, maybe take a look at their config: https://github.com/mekanism/Mekanism/blob/v10.1/src/tools/java/mekanism/tools/common/config/ToolsConfig.java

Describe alternatives you've considered
There are not really alternatives, so I needed to write my own mod that allows me to change these properties. However, my solution includes ToolItem.attackDamage and SwordItem.attackDamage (or whatever they are called in mojang mappings), which iirc you do not use, in favor of your own variables. So I cannot use that mod to change it. (My mod worked perfectly fine for the armor, but I think it would be better to include it in the config as well.)

I strongly agree. This mod balance is broken.

I've also been looking for a way to do this. A config option would be awesome!