Blown Highlights and Shadow Colour Cast


I use a V850 with VueScan and Raw DNG. I am setting the RGB exposure manually to try and avoid clipping highlight detail. However, after bracketing 3 exposures and converting them in NLP, there is no noticeable difference in highlight detail. Can someone shed some light on what is happening?

Also, I am getting blue casts in my shadow areas. Any advice on how to prevent this would also be appreciated.

Many thanks,