Firstly, you could open this in Card and Deck Discussions forum,
moved.
I think main card is Debris Dragon. Because most of cards for it. Lonefire Blossom, Dandylion of course, Card Trooper and Snowman Eater. Even Spore and Glow-Up Bulb. Because we use plants which send graveyard by the tuning with Debris Dragon to summon Spore. For Glow-Up Bulb, we use Dandylion tokens which summoned by sending of Dandylion to graveyard by the tuning with Debris Dragon. So Debris Dragon is very important card. Card Trooper is not new card for Debris Dragon but it was rarely used before Starstrike Blast Set (Glow-Up Bulb, Spore etc.). Snowman Eater is very new for plant synchro deck. Of course it was known, but it being popular in today's.
Quickdraw Synchron balance this deck. If your Debris engine doesn't work againist oppenenet's deck, you can change your deck's synergy to hand. Discarding Dandylion is well known tactic for this card. But you can discard Spore and Glow-Up Bulb if you have a non-tuner monster on your field. For this card and Debris Dragon, you can keep Tuning and Sangan.
Others are preferation. Caius, Gorz, Plague etc. There are some basics for Spells and Traps also. Full Book of Moon is obligatory in my side. Two Pot of Dıality and Pot of Avarice would be good also. Traps need Solemn Warning everytime! Two would be enough.
For extra deck, as you can guess Black Rose Dragon is obligatory. Since we have Quickdraw Synchron, it would be nice Drill Warrior, Junk Destroyer, Junk Archer and Nitro Warrior. If you have noticed we don't have Ryko in this deck. It seems like a preferation but I don't think so. In this version we have Snowman Eater. So Gungnir is better than ıron Chain this time. Scrap Dragon is another Obligatory. Euhm, this part is important, Shooting Red Dragons!
Formula Synchro Stardust Dragon, Shooting Star Dragon, Red Dragon Archfiend, Red Nova Dragon. For Formula Synchron we have Dandylion tokens and Glow-Up Bulb. If you combine yourself, you even able to summon Red Nova.
Well, it's my basics for this deck. Have fun