Ernie Ball Super Slinky 9's for Lead Guitar in Metal?
What a great lead guitar question:
Question: Which strings are best for lead guitar in Metal.I want some that have a ’sharp’ tone. Most of the sharpness will probably come from the Boss Metal-Core Mt-L I tried out. Any suggestions?
Answer: Super slinkys are great strings. The truth is that virtually ALL major string manufacturers use the exact same winding machines and the same materials from the same distributors. I will use several different brands depending on what is on sale. I prefer the following brands;
#1 Daddario XL 120s
#2 GHS Boomers Extra Light
#3 Dean Markley (Blue Steel or standard)
#4 Ernie Ball Super Slinky
All of these are .009-.042 gauge which I have been using for decades.
#1 Daddario XL 120s
#2 GHS Boomers Extra Light
#3 Dean Markley (Blue Steel or standard)
#4 Ernie Ball Super Slinky
All of these are .009-.042 gauge which I have been using for decades.

I used DR Tite fits in 10 and they sound really nice. It really doesnt have a whole lot to do with your strings, adjust your treble settings a little higher and add a little more bass
Slinkys are good, I use them a lot. One more thing: If you are doing any rhythm, Power chords, and such, USE 10S unles you have a long scale like strat or 24 fret schecter or ibanez.
9’s are typically better for jazz or blues, and heavier gauge strings are used in rock or metal. The heavier strings will give you a darker tone, and since you want a "sharp" tone, the 9’s will help attain that. I prefer the super slinky 9’s myself. I play mostly metal, but also blues and rock. It really just comes down to preference. I think the Slinky’s have a slicker feel to them, which makes it easier for me to move around the fretboard.