Ah OK, then yes I think using Toolboxes may well give you what you want, as you can “store” in them many different classes of tools, e.g. Oil Brushes, Pastels, Custom Brushes, etc… etc…
You can read more about Toolboxes here: https://www.artrage.com/manuals/gett...and-workbench/
Unfortunately that web page was written a long time back so ignore all the stuff about Workbench Mode! Unless of course you have AR4 as well as AR6!

One important thing to remember with Toolboxes is that technically they don’t actually hold any of the tools added to them!
When you add a tool into a Toolbox AR makes a shortcut to that specific tool preset on your system.
The upshot of this is two fold;
1: After loading a tool into a Toolbox if you then; rename, move or delete the original tool preset, the Toolbox shortcut to it will fail and you will see a warning message.
2: As no actual tools are contained in Toolboxes they can not be shared with others as the links to the tools will be broken for the other user.