I have a set of unpotted and underwound AIV Mules in my maple neck 3pu Custom LP.
Really a very versatile set, the neck pu is a dream for any kind of music, BIG sound en wonderfull sustained overtones. The bridge pu is a bit thin in comparison but when messing with effects a clean base can be just what you need.
Obviously i play solos on neck and rythm on bridge, if you dont you need a stronger bridge pu, im unsure if just an overwound mule would be enough in that case.
I also have a classic/classic plus set(now in my '73 SG) and man will you be amazed in how much better the mules set sounds. Problem with the classic set is that they overwound an AII magnet which makes it sound much darker then an AIV Mule, if you choose to underwind the Mules youll get an even clearer sound.
From what ive heard around here a Black dog bridge pu might be worth considering if you like the sound of the classic pu's.
Anyway, i personally have no problem boosting my bridge mule to bestiary levels, if you need something versatile go with mules, unpotted.
Greetings Henk