Based on what your expected use of the laptop is. I'd skip the dedicated graphics card, as you already have a powerful desktop available. Try to get the highest amount of RAM and clock speed and you will be fine, from personal experience, you would also be able to skip any issues with thermal performance as you're looking for a lightweight laptop, which I would guess means at most one fan and not a proper heatsink.

As a side note, can't you just remotely access your desktop and run the analyses on that?

Best Regards
Emile Berg