I would have to say a fusion of the two. me and my friends call it the special ed deck. if i get permission from my friend who runs it, I will post it here.
Well, Elemental Hero have soooooooooo much support, but you could make reasonable cases for both, like the power that is Diamond Dude, get Bonding H2O, get out a Water Dragon. Though Miracle Fusion makes the Heroes stand out quite a bit. Then there are cards like Stratos that work for both. I prefer Elemental, but I can see why someone would like Destiny.