User blog comment:RaijinSenshi19/Make It Competitive: Systemic/@comment-24965906-20150524201037/@comment-24965906-20150524205631

Black Edge's text box even says Danse Macabre,

But to each their own.

There's also Dragonic Formation and Dragonic Paratrooper to use to save Black Dagger during battle and not waste your shields, by using other monsters. As well as Dragonic Forcefield to counter effect removal.

Then their's all the Buddy Specific cards like Superior Buddy, Ultimate Buddy! etc. shenanigans that you guys were talking about below, to buff up Black Edge. And Dragonic Directive plus Black Edge can be fairly devastating.

But barring Ein schematics, you've pretty much nailed all of them so far.