I prefer pure nickel strings no nickel steel for me

I prefer the sound of pure nickel it sounds warmer and sweeter. But I just bought a set of flatwounds and absolutely love them

They improve your technique because they are as hard as hell to bend

(BTW I am no Jazz or Blues player!! Whenever I say I use those type of strings everyone expects a bluesist

I play Vai, Satch, Van Halen,
Vinnie Moore and Ozzy type stuff all on 11
gauge strings 
)