What do you think of this deck idea I came up with?

This is interesting. I would suggest putting in a few dark bribes as they will also help with the problem of destruction. Also Im thinking a Vice Dragon might be an interesting addition although I think you have plenty of darks so it probably wont help. A sangan might help thin the deck a little bit and a battle fader comes in handy if a direct attack is coming at you. Again though you may not need them if your deck works well as is.