Gaban him self said that they never face any HK that had CoC.
You can't compare sommers to the elders when they all have CoC .
We see in this flashback Gaban was doing attack and harald was able to heal easy and Gaban said it could be because of CoC.
Gaban and Shanks were even unable to slow him down really.
The argument that luffy never used acoc against elders is one i know of but it sound so stupid it crazy.
When he said he try everything .
But with the way how Oda draw haki guess we won't know.
You can't compare sommers to the elders when they all have CoC .
We see in this flashback Gaban was doing attack and harald was able to heal easy and Gaban said it could be because of CoC.
Gaban and Shanks were even unable to slow him down really.
The argument that luffy never used acoc against elders is one i know of but it sound so stupid it crazy.
When he said he try everything .
But with the way how Oda draw haki guess we won't know.
Also saturn without his zoan like abilities is complete fodder unlike base harald.