The equipment by slot / class pages could really use an update. Currently you can toggle Velious off, but not Kunark. And even that will still show Stonebrunt, etc.
The good thing about the wiki is that most items have lots of useful tags. Let's look at an example:
https://wiki.project1999.com/A_Dark_Reaver
At the bottom you see:
Categories: Classic Era | Items | Shadow Knight Equipment| Primary | 2H Slashing | Lower Guk
This gives you an idea of the kind of things you can do. For example, lets say I want to see SK 2 hand swords that are not usable by warriors (sometimes those are better, or maybe you just want cool weapons with flavor. try this in your search bar:
"2H Slashing" "Shadow Knight Equipment" -"Warrior Equipment" -Kunark -Velious -Epic
The last 4 strings are all "-" meaning, don't show anything that matches those.
Theoretically instead of subtracting Era tags, you could just include "Classic" in your search, to find items with classic tag. The problem is, not all items are tagged! So you have to err on the side of including items you may not want.
If you find something without a tag, and it frustrates you, figure out the right tag and add it!