I would like to wire a double gang box with two pair of receptacles on the same circuit and not switched.

Technique 1: One source told me it is preferable to pigtail hots, neutrals, and grounds to each receptacle in the box so that a possible future receptacle replacement might be easier.

Technique 2: Another technique I have seen is to daisy chain the receptacles using the same wire stripped of some insulation from the middle of the wire to connect to each receptacle post and then to continue those wires to another box. The advantage here I guess is to minimize conductor count in a box.

Which technique is more conventional?

What is the best way to strip insulation off the middle of a wire and what is the recommended spacing of these strippings to accommodate both receptacles?

Thank you.