I will chime in some opinions.
I'm sure single coil and parallel mode on the "Large Humbucker MFDs" would sound pretty cool in the Ric spots and not be too hot. If they are, they turn down nicely.
The typical MFD humbucker, as mentioned before, is hot! Series mode: hot. Parallel mode: less hot. Single mode: pretty nice! However, that is by design. The point was to make a passive pickup that was as aggressive, wide bandwidth, hot, 'modern' sounding as an active pickup--with the volume and tone controls maxed. Roll back the volume and tone controls a touch, and they are now sweeter, vintage output type pickups. Pretty cool.
TBH, the single coil Super Ferrites (on both the bass and guitar) are very similar to the MFD vibe, turn them up and they are aggressive and bite, turn them down a touch, and they are sweet.
G&L tends to place their MFDs in mostly the standard CLF spots: the L1000 has one right in the P bass sweet spot. The L2000 finds them pretty much in the J spots (as does the 1st Gen SB2). The Kiloton (and Climax and L1500) has it's pickup just a touch bridgeward from a Stingray. The Ric spots are uncharted MFD zone, but I'm sure they will work great, as MFDs have clarity for days.
I only have one G&L and it's a beaut! 84 El Toro. It's like the L2000 met a Jazz bass. It uses pickups that were only found in the long discontinued El Toro and Interceptor basses--a "Small Humbucker MFD" wired in series. They sound awesome both active and passive. I did a little mod to my preamp so passive mode is the same volume as active mode.