try to keep your deck at 20 cards to minimize your odds.
you should add Sergeant Electro, Metalmorph, and Windstorm of Etaqua.
Remove the Jammers and fossil excavation and remove 3 cards that wont help you. personally i would remove the polymerizations and that fusion equip spell. and if you have a order to charge use that instead of the greed of shard.
and you will have a good meta
you need at least 50% beatdwon mobs, and 60% to make it balanced, so 10-12 mobs + 8-10 supports, I rather got 3-3-3 dinosaur- 2 any other normal like dunames and jerry OR 2 sargent electro so you can buff your element saurus, total 11 mobs, 1 kuriboh, 1 mirror, 1 metalmorph, 1 de-spell for pvp mai, 1 twister for mai again, 2 order to charge and 2 econs if you carry extra normal
and change otc for 2 more metalmorph if you carry sargent electro (which I rather to get since sargent gives a looot of support not just for his op ability but the 500 extra dmg on element is way too good even if they kill your field
For idk reason, I never see this card in ranked vs dino decks. Either leveling rex to 33 is to much work or this card is just isn't useful.