I like ERA+/ERA- more than FIP. There are just too many really good pitchers who never had great FIPs. That being said, FIP has real value, and not many pitchers have great FIP numbers and fail or are mediocre.
Here are 3 lists of the top 10 SP'ers over the past 10 years: which do you think is most accurate?
600+ IP
A. Scherzer, deGrom, Wheeler, Nola, Cole, Sale, Verlander, Gausman, Kershaw, Gray
B. deGrom, Sale, Webb, Skubal, Bieber, Kershaw, Scherzer, Wheeler, Burnes, Fried
C. deGrom, Kershaw, Sale, Scherzer, Fried, Burnes, Verlander, Woodruff, Skubal, Bieber
It's kinda hard to pick. I'd go A-C-B.
That's fWAR-ERA--FIP