Machina Mayhem Deck, I need some feedbacks.?

This appears to be a good deck. I suggest putting in fusion gate or polymerization with some fusion monsters (like berformet + Gazzelle the king of mythical beasts old but good combination). Remember, if your Obelisk does not have a regular brown back, it is a fake. A good stratagy is watching the combos they use on the battles in tv.