Ciao e benvenuto :)
The Painkiller neck sounds great for leads - very clear, powerful & defined. It's OK clean, but being ceramic magnet (it's the only ceramic neck pickup BKP make), it's not the best. It's not bad split - a very bright, punchy hot single coil tone.
Cold Sweat neck is probably the most popular choice, great clean sounds, clear, smooth lead sounds & powerful enough to balance with the PK bridge.
Nailbomb neck has a bit less low end than the Cold Sweat & slightly harder in the mids, great for lead work & decent for clean sounds. Similar level of power to the CS.
Miracle Man neck might work it's great for lead work, very smooth & powerful. It has a lot of low end & more power than PK, CS or NB, but should not overpower the PK bridge.