Create Synchron and... uh... Attack Gainer?
I'd just Diva when I have RDA on the field, but that's me. =)
Oh and I meant - Shooting Star is quite easy to sync for. A hand of Quickdraw Synchron - Dandylion - 1, 2, or 3-star non-Tuner - Boost Warrior gives a quick Shooting Star (typically 2-star non-Tuner because if you had a 3-star non-Tuner you would be forced to Synchro for Fleur de Chevalier).
Discard Dandylion for Quickdraw Synchron. Get 2 tokens and Quickdraw.
Normal summon the 1/2/3-star, then Special Summon Boost Warrior.
Synchro with Quickdraw for Road Warrior with the token(s) or Fleur de Chevalier without the tokens with a 3-star.
Special Summon Cyber Valley or another generic 1-star Warrior or Machine from your deck if you used a 1-star non-Tuner. Otherwise simply tune for Formula Synchron.
Synchro for Shooting Star.