I would suggest something like this since the best way to Summon "Quasar" and "Stardust Sifr" is using two Level 5 monsters with a Level 2 Tuner Synchro Monster (or a level 6 + level 4 + level 2/level 4 + level 4 + level 4). This is the Extra Deck for my Synchron Deck and it works pretty well.
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