Re: Shredable neck pup for LP to match Distortion b. - with some versatility
The Sh6n is actually a good match for the Sh6 bridge. Hence, the mayhem set. All pickups mentioned so far will work, the liquifire/Crunch Lab were made for Petrucci some years back, after that came the Illuminators set for him.
The Paf Pro & Super2 would have worked as well. Gravity storms, Transitions, Paf Joe, Titan etc too
Depends on what you want to do. Do you want the neck pickup to be as saturated as the bridge pickup? Or do you want the neck to be as loud as the bridge but stay clearer when switching between the two or by rolling the volume knob? Thats where the Paf Pro & Super2 suggestions came from Dimarzio I think, the Super2 is more saturated than Paf Pro.
The Black Winter, Sentinent, Distortion N, Full Shreds, etc work as well, depends on your use.