How to make my 5D Stardust deck more fun?

As the title says I’m looking to make my 5D decks more interesting to play, more fun. I play exclusively casual and in person with my best friend. I don’t like turn 1 multi-synchro summons sort of stuff so my Stardust and Blackwing decks are neglected. What could I do to make it more fun and have more paths that aren’t just Synchro summons?

For my Blackwing deck I’m already thinking of making it more counter oriented which I think will be more fun, but I’m clueless for Stardust. Thank you!