Stacking Camera Raw adjustment layers

Here's a simple minded approach that allows you to rename each layer so that, later you will be notfied of what it contains. 1) Duplicate the original layer; name it "ACR1" Apply ACR and at the "Basics" tab as: set exposure =+1, Contrast=+8. 2) Duplicate the Original file again and name it "ACR2." In the Basics tab, set Clarity=+20, and Saturation as -30. 3) Cmd (Microsoft Cntl) click the original layer and layers "ACR1" and "ACR2." Then Cmd (Microsoft Cntl) + Shift + Opt + "E" ( A "Claw" click) that creates a new composite layer of the 3 layers clicked in the "Claw". Name it "Stamp Vis." It should neatly additively combine all your "Basic" settings made in "ACR1" and "ACR2."  

You can stack them as smart filters (after first converting the original image to a smart object). The effect will be cumulative and "transparent". Try it out and see if it does what you want.