And sub-leaders and officers.I don't think we know for sure.
But, as far as we know, double attack happens at 8% base and triple attack at 3% base. If a stack of 100 means "100% more", then we're comparing 16% double and 6% triple. And double attack is just far better in that case.
But, I don't think anyone has done the data on it. It'd be a really frustrating project, so I can't really blame them either!