Have You tried using this deck with unupped dragons?
I did and while i've lost 3 games in 30 matches with upped dragons, i haven't lost one in 50 matches with unupped dragons.
Maybe that's just luck/coincidence, but that additional 1-3 damage per dragon hardly ever makes a difference when You play ~5 dragons once quantum pool hits the 12 mark for most elements. While being able to play dragons with just 10 quantums for each element may be the difference between win or lose.
I only left the death and light dragons upped since the former has the same cost and the latter gets +2/+2 for just 1 light quanta. (Plus AI will try to kill it first in every situation, which can potentially save crimson or ivory dragon.)
I also used purple dragon instead of 1 tower. True, usually i don't even get the chance to play it even when i have it in my hand since the beggining, but sometimes it's the only dragon i can play.
Also, most players have QTs, Supernovas and Twin Universes from their FG farming decks, so they can build this deck for the cost of ~5k electrum, which isn't really a big deal.
Imho it was the most fun dragon rush deck to play and potentially the best, since You can sometimes play a dragon on Your first or second turn and that's impossible for non-cremation dragon decks. (Yes, i know that it usually takes ~5 turns to play anything.
)