Now that's very interesting :D
I would want to make the guitar more of a Blues guitar but my experience of the Crawler neck pickup suggests that I'm not too keen on vintage 42PE wire and that severely limits my options unless a P90 with 42PE wire has more cut than a humbucker with 42PE wire. The Stockholm would be too hot and dark and while the Mississippi Queen sounds perfect, the 42AWG wire worries me. The same issue surrounds the Blue Note but rather like the Stockholm, would the Supermassive simply be too hot for the application I'm after?
Since P90s are SCs in essense they do have more cut for sure. Now if that is the kind of cut you want I can not say, but the SC attack and definition sure makes a difference to me.
For a blues axe the SM would be too much already imho. Great modern rock PU and very versatile there. Can go up to metal and down to blues, but it lives for modern rock.
The MQ / Nantucket feel classick rock oriented, so they can easily go down to blues and do that very comfortable. Great for dirty blues rock. The alnico 5 is the main thing here. Can also go way heavier.
The Blue note should be very blues oriented, softer and sweeter in sound. Great classic rock sound also.
If you really wanne go bluesy I would say blue note all the way. If you want to go blues rock / rock with it the MQ might be a better shot.