You don't have the computing power to get away with that.
Only open the first raw photo. Apply the sliders, then press "Done".
Then back in Bridge, right-click on that image and choose "Develop Settings>Copy Settings".
Then select the other nine images (or however many it is) and right click and paste the settings.
Then open them one at a time into Photoshop to do the Photoshop work.
I really hate your process.
Edit one photo at a time, and save it as a PSD. Not this ten-at-a-time nonsense.
Then run Image Processor on ALL of them at the end.
First, let's try the easy approach. Add a Solid Color layer of pants colour, set to "Color" blend mode, masked on to the pants, and see if it works.
Then try the same for the shirt.
Let me know if it's not satisfactory.
People get all hung up on enlargement method. The enlargement method doesn't matter. What matters is the sharpening afterwards.
https://www.damiensymonds.net/trainingsharp.html
The clone stamp is the correct method, yes.
But it sounds like you're not doing the masking with it? The masking is crucial.
https://www.damiensymonds.net/2010/10/role-of-masks-when-cloning.html
Lightroom has an inaccurate histogram and clipping warnings.
The histogram can be fixed with soft-proofing, but the clipping warnings are STILL wrong.
Once you actually understand colour spaces and histograms, you'll understand that Lightroom is completely unusable for this reason.
Anybody you meet who says that Lightroom is ok DOESN'T KNOW HOW TO EDIT.