Luffy low diff, makes a mash potato out of Pica golem by elephant gatling.
Stop the nonsense
Luffy neg diff in base. No need to use G2/3, pica can't damage him in his stone form while luffy can break it very easily.
When he can detect pica in the stone, it's a one shot then.
Current luffy would defeat him with his CoC.
When he can detect pica in the stone, it's a one shot then.
Current luffy would defeat him with his CoC.

Grizzly Magnum was doing virtually nothing to Pica.
you grossly overerstimate Luffys DC with EGatling.
the attackrate is high, but the amout of damage each blow deals is insufficient.
Luffy would be hard pressed to corner Pica with the tools he currently has. even including G4.
then on the other hand, Pica has very little chance of taking Luffy out either.
it a damn stupid matchup.
if Luffy manages to corner Pica (which I highly doubt he can) then its a mid diff at best.
after he got confronted by Zoro he was one shot. albeit with a ryou enhanced blow.
Picas golem = Luffy has too little DC
Pica himself = lol, golfclap eas win