I use G3 for the Vcore89.
...used grip 3 with the Wilson BLX PST 90, K90, K88, etc. Same with Prestige mids and all other racquets I've mostly owned with 2 exceptions. Radical midplus at G2 and RDX 500 mid at G4 (because they we're out of stock at the time); I'd rather go for G4 instead of G2 but I find G3 to be my perfect grip across grip shapes. G3s on my Vantage racquets too among other brands I've had.
What Got You Here Won't Get You There --- Marshall Goldsmith
vCore Tour 89; Lux ALU Pwr Feel @63 lbs., on a full string plane