Well, you can't upgrade the novas or the fireflies or it doesn't work. Supernovas cost 2 entropy and upgraded fireflies produce fire instead of light. I would upgrade the adrenaline to make it faster (costs one less
). Then the rustlers to make them more stable. You could also do this the other way around depending on what you were looking for in the deck (slightly faster or more stable). If you wanted to you could upgrade the dragons to do more damage because you generally do end up with a lot of
one you get a few fireflies out but it will in some cases take an extra turn to get your first and possibly second dragon out. One advantage though is you could use one less dragon and have an extra space for something else. After that I would look at what you want the extra spaces (2 blessings used in my post) to be. If you are using 1 or two deflags I would upgrade them early (probably first) because that lowers the cost to one and means you can generally play it right away and probably play two if you have them and draw them. In an upgraded version I would recommend the new card long bow because with the mark of air you get 7 damage for 2 random quanta which is likely to be taken from quanta you were never going to use anyway. Someone earlier mentioned using an upgraded reverse time. There are a lot of different ways to go. I may try to make an upgraded version and post it here.
Edit: I decided not to post a semi-upgraded version because I think there are so many options its more of a personal preference and I think the paragraph above gives a good guide to build it more personally to your own liking. I will say though after some testing that it probably won't be too viable against AI because the double health takes too long to get down and you run into some problems with the fragile creatures. I was only winning about half the time. Top 50 and PvP2 it could hold its own as well as most other rushes.