To get dual strip you have to be VERY good at offhand disarm. I was VERY good at offhand disarm. You ALSO have to have another edge that improves your offhand disarm (Ambidextrous disarmer). You don't have to be as good at offhand disarm to get that edge. Even with the improved offhand disarm, I couldn't disarm bard instruments all that easily. But to sum it up, you have to have Ambidextrous Disarmer before you can get dual strip and you have to have your offhand disarm above 80 to get Ambidextrous and I'm just going to say that offhand disarm has to be even higher to get dual strip. I had a 20 dex. Still with a 20 dex and the edge requring a pre-requisite edge AND being so expensive it should have worked at least once in the fifty thousand times I stripped someone's weapon. I could've taken two healing edges probably, maybe even three with the prerequisite edge included in place of it. I'd seriously consider urging anyone thinking about it not to get it.