But if theres one thing I really want to single at as my favorite thing about the format, its the Saga Creatures
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
Firkrag notably provides additional value for goading, as whenever a creature deals damage to one of your opponents, if it had to attack such as through a goading effect, you can put a +1/+1 counter on Firkrag, drawing a card in the process
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
I think Festival of Embers is going to work best with spells that have multiple abilities and effects