Welcome to the forum!
The Alnico II Pro is my favorite neck pickup. I pair it with the Custom Custom, or for something more balanced, the 59/Custom Hybrid.
I disagree strongly about the Hybrid being more balanced than a Custom Custom. I like the Hybrid a lot in the right guitar but find it quite brash and aggressive in particular in the mids. The more balanced choice with a AlincoII II than ether is a Perpetual Burn. I Pulled a Burn in one guitar and replaced it with a Hybrid thinking it would be more balanced and then swapped them right back after finding it wasn't.
Pair to what end? What goal?
I find that PG's and 59's are great pickups to "pair" with Customs and Distortions, but I like a screamer bridge and classic neck for a wide range....YMMV
I really wish people would clarify when they say Pair/Match/Go with etc.....