Create a pre sets on interface.

a button that you can change your entire set in one click.
Now a days we have a lot of itens, set for drop, set for exp, set for speed, also dodge, crit... etc.

This will help in combat/pvp situation, if you are hunting and someone try o sneak you u can change do speed set, for exemple, you are hunting and a rage monster apper, you can trade do drop, or if you hunt near boss zone, etc.

Is it viable?

This is a very good quality of life update, you could implement this in many ways. I thought of something very similar on boosting monsters as well, where you can personalise and bundle multiple monsters and boost all at once. Great proposal!

The two proposals above are great!