I was going to try and manufacture my own combo, but it only ended in like, a single Siegfried, very underwhelming. However, Swirl/Lamia/Kepler is a 3 card combo listed on the site, so I can build off that combo to get this:
Alternatively, pop Alexander for Lamia instead of Swamp King, and Synchro Lamia+D'Arc into Omega.
Ends with Siegfried, Crystal Wing, and Flare Metal Dragon/Omega on board, and a live Gate. How did I do? (That being said, the hard part is being able to figure this out on the fly while I'm in an actual duel)