Elemental hero/ neo spacian deck?

There are a couple of problems. 1, you have too many cards in your extra deck. You might want to get rid of dark neos, inferno, and terra firma (along with the material). Except for woodsman, all the other material isn't good to draw without polymerization in hand. Remember, the limit for the extra deck/fusion deck is 15 cards, so choose the fusions wisely. The winged kuriboh cards and wroughtweiler are also kind of tough cards to draw and use because they require certain conditions have been met. Only keep O-Oversoul and E-Emergency Call out of the HERO cards because the other ones aren't good enough on their own. Get rid of knopse too. Your dedckn't be more than than 45 cards (main deck) so you can draw the right cards. Consider replacing 1 polymerization for king of the swamp. Lastly, if you can get future fusion and miracle fusion, they'd help a lot.