Adding on, it's just not very consistent to poly the dragons. You use the dragon effect, shuffle one back in, use dragon effect again, and now 2 dragons are in your graveyard and you can't fuse em. Probably one of the only times you should not be reusing the dragon effect is if you're against a 3x accursed deck to tribute out of them. If you have a spot for poly you should replace that with something like skull lair, or any other meta backrow card. Or a tech card. I have a soft spot for skull lair since you dump 3 balls and 2 dragons into the graveyard with little effort. This deck is about going all in, and going fast, and holding dragons to fish for a poly to make a monster that might end up dead on arrival is quite frankly, a waste.

I'd only keep poly if your luck is off the charts and it always manages to end up in the first half of your deck while you never run into anyone with something that can destroy it (order to charge, sphere kuriboh into soul exchange, michizure, yomi ship, rising energy, mirror wall, clowns, you get the point).