I
Iroh
Guest
you got a point would 100 be okI like him and his weapon so far. But 300 times normal gravity is a lot. I'm talking shattering every projectile that comes near him on the ground from the sheer force. Any opponent that goes near him would become mush, even if it's just 10 seconds that it's active.
The only reason Goku, Vegeta, and those people from Dragonball Z can do it is because they're cheaters with their Saiyany bull.
I'd drop that down to 15x normal gravity, which should put a noticeable weight on the opponent but not enough to kill them.