Roll dependable value as multiple NPCs?

Hello, We're running a warhammer 4th ed with campaign with cubicle7 sheets. In WH you want to track 2 values easily in combat: wounds and advantage. Wounds is HP, advantage gives you a + modifier on your rolls and changes every time you roll. But, as we're all familiar with, if you link an attribute to the NPC sheet, it updates all of them if you have like 4 Giant Rats. Normally you fix this for HP by unlinking the attribute, but we cant do that for Advantages because we need the value on the sheet to update so it autocalculates correctly when we roll. Is there just no elegant solution to this? Roll20 doesn't seem to have a setup that can solve this easily.

I'm not familiar with the sheet or the rules... does the sheet use a sheetworker to constantly update Advantage, or do you set it manually? If you're able to put your own value in there without the sheet automatically changing it to something else, put this on a mook character sheet as the Advantage attribute: @{selected|bar3} The sheet rolls are now being pointed towards one of the token bars, so you can track per-mook instead of per-sheet. You'll need to make sure you have the correct token selected before you roll from the sheet, obviously. If you have an issue with broken rolls from empty token bars, just give it a leading zero: 0@{selected|bar3}. Would this work?