Flavor Text Goodness, those scarabs are awfully close
TCG first saw its worldwide release in the early 2000s, there were six monster attributes: Dark, Light, Earth, Wind, Fire and Water
Its earned the greatest High Class Pack title and the market agrees
But even if there may be different sub-strategies, the key cards remain the same: cheap artifact creatures like Magitek Infantry to pile on early pressure, and powerful payoffs that take advantage of your flood of artifacts such as Valkyrie Aerial Unit
Rather than adding expensive cards just to increase the price and have a "non-budget build" of the deck, I'd just keep playing it as is and adjust the sideboard as necessary based on how the Zendikar Rising format develops
Use the creature's power as it last existed on the battlefield to determine how many +1/+1 counters to put on Vincent Valentine